Showing 0–0 of 0 results
# Exercise Title Features Description Platform Keywords
1 Given a two-dimensional array of integers, return the average of the four corner elements. Code Completion Given a two-dimensional array of integers, return the average of the four corner elements. CodeCheck Two-Dimensional Arrays, No Loops
2 Given a two-dimensional array of integers, return the middle element if both the row and column lenghts are odd, or the average of the two or four middle elements of one or both is even. Code Completion Given a two-dimensional array of integers, return the middle element if both the row and column lenghts are odd, or... CodeCheck Two-Dimensional Arrays, No Loops
3 Given a two-dimensional array of integers and a string N, E, S, W, give the middle element along the border in the given compass direction, or the average of the two middle ones if the border length is even. Code Completion Given a two-dimensional array of integers and a string N, E, S, W, give the middle element along the border... CodeCheck Two-Dimensional Arrays, No Loops
4 Given a two-dimensional array of integers and a string NW, NW, SW, SE, return the sum of the four elements in the given compass direction. Code Completion Given a two-dimensional array of integers and a string NW, NW, SW, SE, return the sum of the four elements... CodeCheck Two-Dimensional Arrays, No Loops
5 Given a two-dimensional array of integers, row/column indexes r, c, and a string N E S W, return the neighbor in that direction, or 0 if it doesn't exist. Code Completion Given a two-dimensional array of integers, row/column indexes r, c, and a string N E S W, return the neighbor... CodeCheck Two-Dimensional Arrays, No Loops
6 Repeat with NW NE SW SE. Code Completion Repeat with NW NE SW SE. CodeCheck Two-Dimensional Arrays, No Loops
7 Given a two-dimensional array of integers and row/column indexes r, c, return the number of neighbors (not counting the element itself). Code Completion Given a two-dimensional array of integers and row/column indexes r, c, return the number of neighbors (not counting the element... CodeCheck Two-Dimensional Arrays, No Loops
8 On a chessboard, positions are marked with a letter between a and h for the column and a number between 1 and 8 for the row. Code Completion On a chessboard, positions are marked with a letter between a and h for the column and a number between... CodeCheck Two-Dimensional Arrays, No Loops
9 Given a list of integers of length ≥ 4, return the average of the first two and last two elements. Code Completion Given a list of integers of length ≥ 4, return the average of the first two and last two elements. CodeCheck Lists - Simple Exercises, No loops
10 Given a list of integers of length ≥ 3, return the average of the first, last, and middle element (or the two middle elements if the length is even). Code Completion Given a list of integers of length ≥ 3, return the average of the first, last, and middle element (or... CodeCheck Lists - Simple Exercises, No loops
11 Given a list of integers, swap the first and last elements. Code Completion Given a list of integers, swap the first and last elements. CodeCheck Lists - Simple Exercises, No loops
12 Given a list of integers, swap the first two and the last two elements. Code Completion Given a list of integers, swap the first two and the last two elements. CodeCheck Lists - Simple Exercises, No loops
13 Given an input string, print the string with the first and last letter removed if they were equal, or the original string if they were not. Code Completion Given an input string, print the string with the first and last letter removed if they were equal, or the... CodeCheck Branches, Branches Without Functions
14 Given an actual time and an alarm clock time, both in “military” format (such as 0730 for 7:30am), print how many more minutes before the alarm rings. Code Completion Given an actual time and an alarm clock time, both in “military” format (such as 0730 for 7:30am), print how... CodeCheck Branches, Branches Without Functions
15 Repeat the preceding exercise for U. Code Completion Repeat the preceding exercise for U.S. time (e.g. 7:30am). CodeCheck Branches, Branches Without Functions
16 Given a point with integer coordinates (x, y) and a compass direction N, E, S, W, print the neigboring lattice point. Code Completion Given a point with integer coordinates (x, y) and a compass direction N, E, S, W, print the neigboring lattice... CodeCheck Branches, Branches Without Functions
17 Repeat with compass directions NW, NE, SW, SE. Code Completion Repeat with compass directions NW, NE, SW, SE. CodeCheck Branches, Branches Without Functions
18 On a chessboard, positions are marked with a letter between a and h for the column and a number between 1 and 8 for the row. Code Completion On a chessboard, positions are marked with a letter between a and h for the column and a number between... CodeCheck Branches, Branches Without Functions
19 On a chessboard, fields are marked with a letter between a and h for the column and a number between 1 and 8 for the row. Code Completion On a chessboard, fields are marked with a letter between a and h for the column and a number between... CodeCheck Branches, Branches Without Functions
20 Given the x- and y-coordinates of a point, print whether the point lies in the first, second, third, or fourth quadrant plane, or on the x-axis, or on the y-axis, or the origin. Code Completion Given the x- and y-coordinates of a point, print whether the point lies in the first, second, third, or fourth... CodeCheck Branches, Branches Without Functions
21 Given three numbers x, y, z, determine if one of them is the sum of the two others, and then print out the equation. Code Completion Given three numbers x, y, z, determine if one of them is the sum of the two others, and then... CodeCheck Branches, Branches Without Functions
22 Given three numbers x, y, z, print out how whether they are all distinct, two are the same, or all three are the same. Code Completion Given three numbers x, y, z, print out how whether they are all distinct, two are the same, or all... CodeCheck Branches, Branches Without Functions
23 Given two integers x and y, print their sum, but if it is more than 100 or less than 0, print "out of range". Code Completion Given two integers x and y, print their sum, but if it is more than 100 or less than 0,... CodeCheck Branches, Branches Without Functions
24 Given three integers x, y, z, print the sum of the odd integers. Code Completion Given three integers x, y, z, print the sum of the odd integers. CodeCheck Branches, Branches Without Functions
25 Given three input strings, print all but the shortest one. Code Completion Given three input strings, print all but the shortest one. CodeCheck Branches, Branches Without Functions
26 Given a two-dimensional array of integers, return the number of distinct elements. Code Completion Given a two-dimensional array of integers, return the number of distinct elements. CodeCheck Two-Dimensional Arrays, Complex Loops
27 Given a two-dimensional array of integers, remove any adjacent duplicate rows by filling the duplicates with zeroes. Code Completion Given a two-dimensional array of integers, remove any adjacent duplicate rows by filling the duplicates with zeroes. CodeCheck Two-Dimensional Arrays, Complex Loops
28 Given a two-dimensional array of integers, return the index of the first row that is entirely filled with zeroes. Code Completion Given a two-dimensional array of integers, return the index of the first row that is entirely filled with zeroes. CodeCheck Two-Dimensional Arrays, Complex Loops
29 Given a two-dimensional array of integers, return the top left corner of the first subarray of the form <pre>0 0 0 0</pre> Code Completion Given a two-dimensional array of integers, return the top left corner of the first subarray of the form 
0 0...
CodeCheck Two-Dimensional Arrays, Complex Loops
30 Given a two-dimensional array of integers, return the position of the largest square subarray filled with zeroes, as a list of length 2. Code Completion Given a two-dimensional array of integers, return the position of the largest square subarray filled with zeroes, as a list... CodeCheck Two-Dimensional Arrays, Complex Loops
31 Repeat the previous exercise with subarrays that are not necessarily square. Code Completion Repeat the previous exercise with subarrays that are not necessarily square. CodeCheck Two-Dimensional Arrays, Complex Loops
32 Given a list of integers, count how many elements are negative. Code Completion Given a list of integers, count how many elements are negative. CodeCheck Lists - Simple Exercises, Counting Elements
33 Given a list a, count how many times the ith element from the front equals the ith element from the back. Code Completion Given a list a, count how many times the ith element from the front equals the ith element from the... CodeCheck Lists - Simple Exercises, Counting Elements
34 Given a list of integers and two values a and b, count how many elements are at least a and at most b. Code Completion Given a list of integers and two values a and b, count how many elements are at least a and... CodeCheck Lists - Simple Exercises, Counting Elements
35 Given a list of integers, return the most frequent element. Code Completion Given a list of integers, return the most frequent element. If there is more than one element with maximum frequency,... CodeCheck Lists - Simple Exercises, Counting Elements
36 Given a list of integers, return a list of all elements that occur with maximum frequency. Code Completion Given a list of integers, return a list of all elements that occur with maximum frequency. CodeCheck Lists - Simple Exercises, Counting Elements
37 Given a list of integers, return the position of the first element that occurs more than once, or -1 if all elements occur exactly once. Code Completion Given a list of integers, return the position of the first element that occurs more than once, or -1 if... CodeCheck Lists - Simple Exercises, Counting Elements
38 Given a list of integers, return a list of all elements that occur exactly once. Code Completion Given a list of integers, return a list of all elements that occur exactly once. CodeCheck Lists - Simple Exercises, Counting Elements
39 Given a list of integers, remove all elements that occur more than once, leaving the first occurrence. Code Completion Given a list of integers, remove all elements that occur more than once, leaving the first occurrence. CodeCheck Lists - Simple Exercises, Counting Elements
40 Given two lists of integers a and b of the same length, count the number of positions where the lists have the same elements. Code Completion Given two lists of integers a and b of the same length, count the number of positions where the lists... CodeCheck Lists - Simple Exercises, Counting Elements
41 Given two lists of integers a and b of the same length, count the number of positions where the list elements differ by at least 2. Code Completion Given two lists of integers a and b of the same length, count the number of positions where the list... CodeCheck Lists - Simple Exercises, Counting Elements
42 Given two lists a and b, remove all elements of b from a. Code Completion Given two lists a and b, remove all elements of b from a. CodeCheck Lists - Simple Exercises, Double Loops
43 Given two lists a and b, return a list that contains all elements occurring in a but not in b. Code Completion Given two lists a and b, return a list that contains all elements occurring in a but not in b. CodeCheck Lists - Simple Exercises, Double Loops
44 Given a list a, return the longest n so that the first n elements equal the last n elements. Code Completion Given a list a, return the longest n so that the first n elements equal the last n elements. CodeCheck Lists - Simple Exercises, Double Loops
45 Given a list of integers, return the largest sum of consecutive elements. Code Completion Given a list of integers, return the largest sum of consecutive elements. CodeCheck Lists - Simple Exercises, Double Loops
46 Given a list of integers, return the largest sequence whose reverse also occurs somewhere in the list. Code Completion Given a list of integers, return the largest sequence whose reverse also occurs somewhere in the list. CodeCheck Lists - Simple Exercises, Double Loops
47 Given a list a of integers, return a list of all elements of a that occur exactly once. Code Completion Given a list a of integers, return a list of all elements of a that occur exactly once. CodeCheck Lists - Simple Exercises, Double Loops
48 Given a list of integers, return a list of lists of length 2, containing each unique element together with its frequency. Code Completion Given a list of integers, return a list of lists of length 2, containing each unique element together with its... CodeCheck Lists - Simple Exercises, Double Loops
49 Given a list of integers, return the position of the longest subsequence of consecutive integers a, a + 1, a + 2, . Code Completion Given a list of integers, return the position of the longest subsequence of consecutive integers a, a + 1, a... CodeCheck Lists - Simple Exercises, Double Loops
50 Given an integer n, return a list of length n containing 1 -1 1 -1 . Code Completion Given an integer n, return a list of length n containing 1 -1 1 -1 ... CodeCheck Lists - Simple Exercises, Filling
51 Given integers n and k, return a list of length n containing 0 1 2 . Code Completion Given integers n and k, return a list of length n containing 0 1 2 ... k-1 0 1 2... CodeCheck Lists - Simple Exercises, Filling
52 Given integers a and b, return a list containing a, a + 1, a + 2, . Code Completion Given integers a and b, return a list containing a, a + 1, a + 2, ..., b. CodeCheck Lists - Simple Exercises, Filling
53 Given integers a and b, return a list containing all even numbers that are at least a and at most b. Code Completion Given integers a and b, return a list containing all even numbers that are at least a and at most... CodeCheck Lists - Simple Exercises, Filling
54 Given an integer n, return a list containing 1 2 2 3 3 3 4 4 4 4 . Code Completion Given an integer n, return a list containing 1 2 2 3 3 3 4 4 4 4 ... and... CodeCheck Lists - Simple Exercises, Filling
55 Given a list of integers and a value, return the position of the last occurrence of the value in the list, or -1 if the value does not exist. Code Completion Given a list of integers and a value, return the position of the last occurrence of the value in the... CodeCheck Lists - Simple Exercises, Finding Elements
56 Given a list of integers and a value, return the difference between the last and first position of the value in the list, or -1 if the value does not exist. Code Completion Given a list of integers and a value, return the difference between the last and first position of the value... CodeCheck Lists - Simple Exercises, Finding Elements
57 Given a list of integers and a value, return a list of all positions of the value in the list. Code Completion Given a list of integers and a value, return a list of all positions of the value in the list. CodeCheck Lists - Simple Exercises, Finding Elements
58 Given a list of integers and a value, return the position of the element that is closest to the value. Code Completion Given a list of integers and a value, return the position of the element that is closest to the value.... CodeCheck Lists - Simple Exercises, Finding Elements
59 Given two lists of integers of the same length, return the first position where their elements are the same. Code Completion Given two lists of integers of the same length, return the first position where their elements are the same. CodeCheck Lists - Simple Exercises, Finding Elements
60 Given two lists of integers of the same length, return the first position where their elements differ. Code Completion Given two lists of integers of the same length, return the first position where their elements differ. CodeCheck Lists - Simple Exercises, Finding Elements
61 Given two numbers, return true if they both have the same sign. Code Completion Given two numbers, return true if they both have the same sign. CodeCheck Branches, Branches with Functions
62 Write a function that checks whether two points with coordinates x1, y1 and x2, y2 are in the same quadrant. Code Completion Write a function that checks whether two points with coordinates x1, y1 and x2, y2 are in the same quadrant. CodeCheck Branches, Branches with Functions
63 Given two numbers, return their distance if it less than 10, or 10 otherwise. Code Completion Given two numbers, return their distance if it less than 10, or 10 otherwise. CodeCheck Branches, Branches with Functions
64 On a chessboard, positions are marked with a letter between a and h for the column and a number between 1 and 8 for the row. Code Completion On a chessboard, positions are marked with a letter between a and h for the column and a number between... CodeCheck Branches, Branches with Functions
65 Given three numbers x, y, z and a Boolean variable <code>strict</code>, return <code>true</code> if <code>strict</code> is false and x ≤ y ≤ z, or <code>strict</code> is true and x &lt; y &lt; z. Code Completion Given three numbers x, y, z and a Boolean variable strict, return true if strict is false and x ≤... CodeCheck Branches, Branches with Functions
66 Given four numbers a, b, c, d, return true if exactly two of them are the same. Code Completion Given four numbers a, b, c, d, return true if exactly two of them are the same. CodeCheck Branches, Branches with Functions
67 Given three numbers, return true if they are evenly spaced; that is, sorted in ascending or descending order, with the same distance between them. Code Completion Given three numbers, return true if they are evenly spaced; that is, sorted in ascending or descending order, with the... CodeCheck Branches, Branches with Functions
68 Repeat for four numbers. Code Completion Repeat for four numbers. Hint: Use the previous problem. CodeCheck Branches, Branches with Functions
69 Given numbers x, y, and target, return whichever of x and y is closer to the target. Code Completion Given numbers x, y, and target, return whichever of x and y is closer to the target. If they have... CodeCheck Branches, Branches with Functions
70 Given a two-dimensional array of integers and row/column positions r, c, return the largest neighbor in the compass directions N E S W. Code Completion Given a two-dimensional array of integers and row/column positions r, c, return the largest neighbor in the compass directions N... CodeCheck Two-Dimensional Arrays, Looping over Neighbors
71 Given a two-dimensional array of integers and row/column positions r, c, return the largest neighbor in the compass directions N E S W NE NW SE SW. Code Completion Given a two-dimensional array of integers and row/column positions r, c, return the largest neighbor in the compass directions N... CodeCheck Two-Dimensional Arrays, Looping over Neighbors
72 Given a two-dimensional array of integers and row/column positions r, c, return the compass direction of the largest neighbor as a string N E S W NE NW SE SW. Code Completion Given a two-dimensional array of integers and row/column positions r, c, return the compass direction of the largest neighbor as... CodeCheck Two-Dimensional Arrays, Looping over Neighbors
73 Given a two-dimensional array of integers, row/column positions r, c, and a value x, fill the given element and its neighbors in the compass directions N E S W NE NW SE SW with x. Code Completion Given a two-dimensional array of integers, row/column positions r, c, and a value x, fill the given element and its... CodeCheck Two-Dimensional Arrays, Looping over Neighbors
74 Given a two-dimensional array a of integers and row/column positions r, c, return a 3x3 array whose middle element is a[r][c], and whose neighbors are copied from the original. Code Completion Given a two-dimensional array a of integers and row/column positions r, c, return a 3x3 array whose middle element is... CodeCheck Two-Dimensional Arrays, Looping over Neighbors
75 Given a two-dimensional array of integers, compute the sum of all positive elements. Code Completion Given a two-dimensional array of integers, compute the sum of all positive elements. CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
76 Given a two-dimensional array of integers, return the largest element in the array. Code Completion Given a two-dimensional array of integers, return the largest element in the array. CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
77 Given a two-dimensional array of integers, return the position of the smallest element in the array as a list of length 2. Code Completion Given a two-dimensional array of integers, return the position of the smallest element in the array as a list of... CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
78 Given a two-dimensional array of integers and a value x, return the position of the first match as a list of length 2. Code Completion Given a two-dimensional array of integers and a value x, return the position of the first match as a list... CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
79 Given a two-dimensional array of integers and a value x, return the positions of all matching elements, as a list of arrays of length 2. Code Completion Given a two-dimensional array of integers and a value x, return the positions of all matching elements, as a list... CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
80 Given a two-dimensional array of integers, compute the sum of all elements that are not one of the borders. Code Completion Given a two-dimensional array of integers, compute the sum of all elements that are not one of the borders. CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
81 Given a two-dimensional square array of integers, compute the sum of all elements that are not on one of the diagonals. Code Completion Given a two-dimensional square array of integers, compute the sum of all elements that are not on one of the... CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
82 Given a two-dimensional array of integers, replace all negative elements with zero. Code Completion Given a two-dimensional array of integers, replace all negative elements with zero. CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
83 Given a two-dimensional array of integers, reverse all rows. Code Completion Given a two-dimensional array of integers, reverse all rows. CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
84 Given a two-dimensional array of integers, shift each row by one to the right and put a 0 at the leftmost column. Code Completion Given a two-dimensional array of integers, shift each row by one to the right and put a 0 at the... CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
85 Given an r x c array of integers, return an (r + 2) x (c + 2) array whose borders are zero and whose interior is the original array. Code Completion Given an r x c array of integers, return an (r + 2) x (c + 2) array whose borders... CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
86 Given a two-dimensional array of integers, return a list of the largest element in each row. Code Completion Given a two-dimensional array of integers, return a list of the largest element in each row. CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
87 Given a two-dimensional array of integers, return a list of the number of negative elements in each row. Code Completion Given a two-dimensional array of integers, return a list of the number of negative elements in each row. CodeCheck Two-Dimensional Arrays, Looping Over the Entire Array
88 Given a two-dimensional array of integers and a row index, return the largest element in that row. Code Completion Given a two-dimensional array of integers and a row index, return the largest element in that row. CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
89 Given a two-dimensional array of integers and a row index r, reverse the given row. Code Completion Given a two-dimensional array of integers and a row index r, reverse the given row. CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
90 Given a two-dimensional square array of integers, reverse both diagonals. Code Completion Given a two-dimensional square array of integers, reverse both diagonals. CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
91 Given a two-dimensional array of integers and a column index, return the smallest element in that column. Code Completion Given a two-dimensional array of integers and a column index, return the smallest element in that column. CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
92 Given a two-dimensional array of integers, an index, and a string R or C, return the sum of the elements in that row or column. Code Completion Given a two-dimensional array of integers, an index, and a string R or C, return the sum of the elements... CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
93 Given a two-dimensional array of integers, a row index r, and a column index c, return the sum of all elements in the given row and column. Code Completion Given a two-dimensional array of integers, a row index r, and a column index c, return the sum of all... CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
94 Given a two-dimensional array of integers and a string N, E, S, W, return the sum of all elements of the border in the given compass direction. Code Completion Given a two-dimensional array of integers and a string N, E, S, W, return the sum of all elements of... CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
95 Given a two-dimensional array of integers, return the sum of all elements along the north and south border. Code Completion Given a two-dimensional array of integers, return the sum of all elements along the north and south border. CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
96 Given a two-dimensional array of integers, return the sum of all elements along all borders but not the corners. Code Completion Given a two-dimensional array of integers, return the sum of all elements along all borders but not the corners. CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
97 Given a two-dimensional array of integers, return the sum of all elements along all borders including the corners. Code Completion Given a two-dimensional array of integers, return the sum of all elements along all borders including the corners. CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
98 Given a two-dimensional square array of integers, return the sum of the elements along both diagonals. Code Completion Given a two-dimensional square array of integers, return the sum of the elements along both diagonals. Make sure not to... CodeCheck Two-Dimensional Arrays, Loops Along a Row or Column
99 Given a list of integers, return the position of the first occurrence of the largest element. Code Completion Given a list of integers, return the position of the first occurrence of the largest element. CodeCheck Lists - Simple Exercises, Maximum and Minimum
100 Given a list of integers, return the position of the last occurrence of the largest element. Code Completion Given a list of integers, return the position of the last occurrence of the largest element. CodeCheck Lists - Simple Exercises, Maximum and Minimum
101 Given a list of integers, return the difference of the positions of the first and the last occurrence of the largest element. Code Completion Given a list of integers, return the difference of the positions of the first and the last occurrence of the... CodeCheck Lists - Simple Exercises, Maximum and Minimum
102 Given a list of integers, return the difference between the maximum and minimum. Code Completion Given a list of integers, return the difference between the maximum and minimum. CodeCheck Lists - Simple Exercises, Maximum and Minimum
103 Given a list of integers, swap the the maximum and minimum. Code Completion Given a list of integers, swap the the maximum and minimum. CodeCheck Lists - Simple Exercises, Maximum and Minimum
104 Given a list of integers, return the second-largest element. Code Completion Given a list of integers, return the second-largest element. CodeCheck Lists - Simple Exercises, Maximum and Minimum
105 Given a list of elements, find the shortest distance between two consecutive elements. Code Completion Given a list of elements, find the shortest distance between two consecutive elements. CodeCheck Lists - Simple Exercises, Maximum and Minimum
106 Given a list of integers and an integer n, remove all elementts &gt; n or &lt; -n. Code Completion Given a list of integers and an integer n, remove all elementts > n or < -n. Shift all remaining... CodeCheck Lists - Simple Exercises, Moving or Removing Elements
107 Given a list of integers, move all zeroes to the back. Code Completion Given a list of integers, move all zeroes to the back. CodeCheck Lists - Simple Exercises, Moving or Removing Elements
108 Given a list of integers, move all zeroes to the front. Code Completion Given a list of integers, move all zeroes to the front. CodeCheck Lists - Simple Exercises, Moving or Removing Elements
109 Given a list of integers, move all negative numbers to the front and all positive numbers to the back, keeping their relative order. Code Completion Given a list of integers, move all negative numbers to the front and all positive numbers to the back, keeping... CodeCheck Lists - Simple Exercises, Moving or Removing Elements
110 Given a list of integers, remove all even elements that occur exactly twice. Code Completion Given a list of integers, remove all even elements that occur exactly twice. CodeCheck Lists - Simple Exercises, Moving or Removing Elements
111 Given a list of integers, remove all adjacent duplicates. Code Completion Given a list of integers, remove all adjacent duplicates. CodeCheck Lists - Simple Exercises, Moving or Removing Elements
112 Given a string s and an integer n, return a string in which each of the characters in s is repeated n times. Code Completion Given a string s and an integer n, return a string in which each of the characters in s is... CodeCheck Strings, Other String Operations
113 Given a string s, return the first vowel that is doubled in the string. Code Completion Given a string s, return the first vowel that is doubled in the string. CodeCheck Strings, Other String Operations
114 Given a string s, return the string with adjacent duplicates removed. Code Completion Given a string s, return the string with adjacent duplicates removed. For example, Mississippi yields Misisipi. CodeCheck Strings, Other String Operations
115 Given a string s and a string t, return a string in which all the characters of s that occur in t have been replaced by a _ character. Code Completion Given a string s and a string t, return a string in which all the characters of s that occur... CodeCheck Strings, Other String Operations
116 Given a string, return a string composed first of all characters at even positions and then of all characters at odd positions. Code Completion Given a string, return a string composed first of all characters at even positions and then of all characters at... CodeCheck Strings, Other String Operations
117 Write a method that undoes the effect of the preceding exercise. Code Completion Write a method that undoes the effect of the preceding exercise. CodeCheck Strings, Other String Operations
118 Given a string and two characters x and y (as strings of length 1), interchange all occurrences of x and y. Code Completion Given a string and two characters x and y (as strings of length 1), interchange all occurrences of x and... CodeCheck Strings, Other String Operations
119 Given a string s and a character c (as string of length 1), return a string with the characters surrounding the first occurrence of c reversed. Code Completion Given a string s and a character c (as string of length 1), return a string with the characters surrounding... CodeCheck Strings, Other String Operations
120 Given a string s and a character c (as string of length 1), return a string with the characters surrounding any occurrence of c reversed. Code Completion Given a string s and a character c (as string of length 1), return a string with the characters surrounding... CodeCheck Strings, Other String Operations
121 Given an integer n, produce the array <pre>0 1 2 3 . Code Completion Given an integer n, produce the array 
0 1 2 3 ... n 1 2 3 4 ... 0 ......
CodeCheck Two-Dimensional Arrays, Producing 2D Arrays
122 Given two two-dimensional arrays a and b of integers with the same number of rows and columns, return a list of the same size where each element is the greater of the corresponding elements in the two arrays. Code Completion Given two two-dimensional arrays a and b of integers with the same number of rows and columns, return a list... CodeCheck Two-Dimensional Arrays, Producing 2D Arrays
123 Repeat the preceding exercise where the array dimensions need not match, filling positions that exist in neither array with 0. Code Completion Repeat the preceding exercise where the array dimensions need not match, filling positions that exist in neither array with 0. CodeCheck Two-Dimensional Arrays, Producing 2D Arrays
124 Given two two-dimensional arrays of integers with the same number of rows and columns, return the first position where they do not match, as a list of length 2. Code Completion Given two two-dimensional arrays of integers with the same number of rows and columns, return the first position where they... CodeCheck Two-Dimensional Arrays, Producing 2D Arrays
125 Given two two-dimensional arrays with the same number of rows, return a list that places them side by side. Code Completion Given two two-dimensional arrays with the same number of rows, return a list that places them side by side. CodeCheck Two-Dimensional Arrays, Producing 2D Arrays
126 Repeat where the row lengths don't have to match. Code Completion Repeat where the row lengths don't have to match. Fill the shorter array with zeroes. CodeCheck Two-Dimensional Arrays, Producing 2D Arrays
127 Given a two-dimensional array a, return a list whose [i][j] element is the average of the neighbors of a[i][j] in the N, E, S, W direction. Code Completion Given a two-dimensional array a, return a list whose [i][j] element is the average of the neighbors of a[i][j] in... CodeCheck Two-Dimensional Arrays, Producing 2D Arrays
128 Given two strings s and t, return the first position where their characters differ, or -1 if they are identical. Code Completion Given two strings s and t, return the first position where their characters differ, or -1 if they are identical. CodeCheck Strings, Comparing Strings
129 Given two strings s and t, return the first position where their characters are the same, or -1 if there is no such position. Code Completion Given two strings s and t, return the first position where their characters are the same, or -1 if there... CodeCheck Strings, Comparing Strings
130 Given a string s, count how many times the ith character from the front equals the ith character from the back. Code Completion Given a string s, count how many times the ith character from the front equals the ith character from the... CodeCheck Strings, Comparing Strings
131 Given strings s and t, return a list of all positions in which t occurs in s. Code Completion Given strings s and t, return a list of all positions in which t occurs in s. CodeCheck Strings, Finding Substrings
132 Given strings s and t, return a string in which all occurrences of t are removed from s. Code Completion Given strings s and t, return a string in which all occurrences of t are removed from s. CodeCheck Strings, Finding Substrings
133 Given strings s and t, return a string in which all characters in t are removed from s. Code Completion Given strings s and t, return a string in which all characters in t are removed from s. CodeCheck Strings, Finding Substrings
134 Given a string s, return the longest prefix that is repeated somewhere else in the string. Code Completion Given a string s, return the longest prefix that is repeated somewhere else in the string. CodeCheck Strings, Finding Substrings
135 Given a string s, find the longest prefix that also occurs at the end (so that s = p + t + p), and return t, the string without the beginning and the end. Code Completion Given a string s, find the longest prefix that also occurs at the end (so that s = p +... CodeCheck Strings, Finding Substrings
136 Given a string, return the string with the first and last characters swapped. Code Completion Given a string, return the string with the first and last characters swapped. CodeCheck Strings, No Loops
137 Given a string, return the string with the middle two characters removed if it has even length, and the middle character removed if it has odd length. Code Completion Given a string, return the string with the middle two characters removed if it has even length, and the middle... CodeCheck Strings, No Loops
138 Given a string, return the string with the middle two characters swapped if it has even length, and the middle three characters swapped if it has odd length. Code Completion Given a string, return the string with the middle two characters swapped if it has even length, and the middle... CodeCheck Strings, No Loops
139 Given a string, return the string with the first and second half swapped. Code Completion Given a string, return the string with the first and second half swapped. If the string has odd length, leave... CodeCheck Strings, No Loops
140 Given a string, return the string with the first half and the second half doubled. Code Completion Given a string, return the string with the first half and the second half doubled. For example, Java becomes JaJavava... CodeCheck Strings, No Loops
141 Given a string, find the first integer inside and return its value as an integer. Code Completion Given a string, find the first integer inside and return its value as an integer. Return 0 if there is... CodeCheck Strings, Numbers in Strings
142 Given a string, find the sum of all integers inside. Code Completion Given a string, find the sum of all integers inside. Return 0 if there is no integer inside. CodeCheck Strings, Numbers in Strings
143 Given a string, find all integers inside and return a string that separates them by commas. Code Completion Given a string, find all integers inside and return a string that separates them by commas. CodeCheck Strings, Numbers in Strings
144 Given a string in which words are separated by spaces, return the longest word. Code Completion Given a string in which words are separated by spaces, return the longest word. CodeCheck Strings, Words
145 Given a string in which words are separated by spaces, return the first word that is duplicated (such as an accidental “this this”. Code Completion Given a string in which words are separated by spaces, return the first word that is duplicated (such as an... CodeCheck Strings, Words
146 Given a string in which words are separated by spaces, return the first word that is repeated somewhere in the string. Code Completion Given a string in which words are separated by spaces, return the first word that is repeated somewhere in the... CodeCheck Strings, Words
147 Given a string in which words are separated by spaces, and two words a and b, interchange all occurrences of a and b. Code Completion Given a string in which words are separated by spaces, and two words a and b, interchange all occurrences of... CodeCheck Strings, Words
148 Given a list of integers, return the sum of all positive elements. Code Completion Given a list of integers, return the sum of all positive elements. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
149 Given a list of integers, find the largest sum of two different elements in the list. Code Completion Given a list of integers, find the largest sum of two different elements in the list. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
150 Given a list of floating-point numbers, return a list of the averages of consecutive element pairs of the original list. Code Completion Given a list of floating-point numbers, return a list of the averages of consecutive element pairs of the original list. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
151 Given a list of integers and an integer n, return a list of the averages of n consecutive elements of the original list. Code Completion Given a list of integers and an integer n, return a list of the averages of n consecutive elements of... CodeCheck Lists - Simple Exercises, Sums, Averages, Products
152 Given a list of integers, return the average of all elements that are not the maximum or minimum. Code Completion Given a list of integers, return the average of all elements that are not the maximum or minimum. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
153 Given a list of integers, replace each element with the average of its neighbors. Code Completion Given a list of integers, replace each element with the average of its neighbors. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
154 Given a list of integers, return the sum of all odd elements. Code Completion Given a list of integers, return the sum of all odd elements. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
155 Given a list of integers and two values a and b, return the sum of all elements that are at least a and at most b. Code Completion Given a list of integers and two values a and b, return the sum of all elements that are at... CodeCheck Lists - Simple Exercises, Sums, Averages, Products
156 Given a list of integers, return the average of all positive elements. Code Completion Given a list of integers, return the average of all positive elements. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
157 Given a list of strings and a string s, return the average length of all strings containing s. Code Completion Given a list of strings and a string s, return the average length of all strings containing s. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
158 Given a list of integers, return the product of all non-zero elements. Code Completion Given a list of integers, return the product of all non-zero elements. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
159 Given a list of integers, give the largest n so that the sum of the first n elements equals the sum of the remaining elements. Code Completion Given a list of integers, give the largest n so that the sum of the first n elements equals the... CodeCheck Lists - Simple Exercises, Sums, Averages, Products
160 Given a list of integers, give the largest n ≤ length / 2 so that the sum of the first n elements equals the sum of the last n elements. Code Completion Given a list of integers, give the largest n ≤ length / 2 so that the sum of the first... CodeCheck Lists - Simple Exercises, Sums, Averages, Products
161 Given a list of integers, give the largest sum of n consecutive elements. Code Completion Given a list of integers, give the largest sum of n consecutive elements. CodeCheck Lists - Simple Exercises, Sums, Averages, Products
162 Given a list of integers, return a list of length 2 containing the first and last element, in sorted order. Code Completion Given a list of integers, return a list of length 2 containing the first and last element, in sorted order. CodeCheck Lists - Simple Exercises, Two Answers
163 Given a list of integers, return a list of length 2 containing the minimum and the maximum. Code Completion Given a list of integers, return a list of length 2 containing the minimum and the maximum. CodeCheck Lists - Simple Exercises, Two Answers
164 Given a list of integers, return a list of length 2, with the number of positive and the number of negative elements in the list. Code Completion Given a list of integers, return a list of length 2, with the number of positive and the number of... CodeCheck Lists - Simple Exercises, Two Answers
165 Given a list of integers, return a list of length 2, each being a list. Code Completion Given a list of integers, return a list of length 2, each being a list. The first one holds the... CodeCheck Lists - Simple Exercises, Two Answers
166 Given a list of integers, return a list of length 2, each being a list. Code Completion Given a list of integers, return a list of length 2, each being a list. The first one holds the... CodeCheck Lists - Simple Exercises, Two Answers