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# 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 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
10 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
11 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
12 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
13 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
14 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
15 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
16 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
17 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
18 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
19 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
20 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
21 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
22 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
23 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
24 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
25 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
26 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
27 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
28 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
29 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
30 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
31 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
32 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
33 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
34 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
35 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
36 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
37 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
38 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
39 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
40 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
41 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
42 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
43 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
44 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
45 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
46 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
47 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
48 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
49 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
50 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
51 (Two-dim arrays) Matrix multiply - CSEdPad This program demonstrates the multiplication of two matrices using a two-dimensional array AnnEx 2d arrays
52 Updating Two-Dimensional Array (Case 1) Construct a program that initializes a 3x4 two-dimensional matrix that has the numbers 1 through 12 for entries, sets the... PCEX
53 Updating Two-Dimensional Array (Case 2) Construct a program that initializes a 3x3 two-dimensional matrix that has the numbers 1 through 9 for entries, sets the... PCEX
54 Updating Two-Dimensional Array (Case 3) Construct a program that initializes a 2x4 two-dimensional matrix that has multiples of 10 from 10 to 80 for entries,... PCEX
55 Updating Two-Dimensional Array (Case 1) Construct a program that initializes a 3x4 two-dimensional matrix that has the numbers 1 through 12 for entries, sets the... PCEX
56 Updating Two-Dimensional Array (Case 2) Construct a program that initializes a 3x3 two-dimensional matrix that has the numbers 1 through 9 for entries, sets the... PCEX
57 Updating Two-Dimensional Array (Case 3) Construct a program that initializes a 2x4 two-dimensional matrix that has multiples of 10 from 10 to 80 for entries,... PCEX
58 csedpad.14.TwoDimensionalArrays.no_topic_1 This program generates a tictac toe board by using a two dimensional array. PCEX
59 csedpad.14.TwoDimensionalArrays.no_topic PCEX Set of activities for csedpad.14.TwoDimensionalArrays.no_topic PCEX
60 csedpad.14.TwoDimensionalArrays.no_topic This program calculates the average performance of 2 students by combining their performance in quiz, homework and discussion. PCEX
61 csedpad.14.TwoDimensionalArrays.no_topic_1 PCEX Set of activities for csedpad.14.TwoDimensionalArrays.no_topic_1 PCEX
62 csedpad.14.TwoDimensionalArrays.no_topic_1 This program stores the ratings for 4 different movies and finds the average rating for the third movie. PCEX
63 csedpad.14.TwoDimensionalArrays.no_topic_1 this program calculates the total cost of different items by multiplying unit cost of an item with count of items PCEX
64 csedpad.14.TwoDimensionalArrays.twodimensionalarrays PCEX Set of activities for csedpad.14.TwoDimensionalArrays.twodimensionalarrays PCEX
65 csedpad.14.TwoDimensionalArrays.twodimensionalarrays Generate a 5 x 5 Bingo board and initialize it with random numbers from 1 to 75. The board will... PCEX