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# Exercise Title Features Description Platform Keywords
1 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
2 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
3 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
4 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
5 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
6 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
7 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
8 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
9 Given two arrays a and b, remove all elements of b from a. Code Completion Given two arrays a and b, remove all elements of b from a. CodeCheck Arrays - Simple Exercises, Double Loops
10 Given an array a, return the longest n so that the first n elements equal the last n elements. Code Completion Given an array a, return the longest n so that the first n elements equal the last n elements. CodeCheck Arrays - Simple Exercises, Double Loops
11 Given an array of integers, return the largest sum of consecutive elements. Code Completion Given an array of integers, return the largest sum of consecutive elements. CodeCheck Arrays - Simple Exercises, Double Loops
12 Given an array of integers, return the largest sequence whose reverse also occurs somewhere in the array. Code Completion Given an array of integers, return the largest sequence whose reverse also occurs somewhere in the array. CodeCheck Arrays - Simple Exercises, Double Loops
13 Given an array a of integers, return an array of all elements of a that occur exactly once. Code Completion Given an array a of integers, return an array of all elements of a that occur exactly once. CodeCheck Arrays - Simple Exercises, Double Loops
14 Given two arrays a and b, return an array that contains all elements occurring in a but not in b. Code Completion Given two arrays a and b, return an array that contains all elements occurring in a but not in b. CodeCheck Arrays - Simple Exercises, Double Loops
15 Given an array of integers, return the position of the longest subsequence of consecutive integers a, a + 1, a + 2, . Code Completion Given an array of integers, return the position of the longest subsequence of consecutive integers a, a + 1, a... CodeCheck Arrays - Simple Exercises, Double Loops
16 Given an array of integers, return an array of arrays of length 2, containing each unique element together with its frequency. Code Completion Given an array of integers, return an array of arrays of length 2, containing each unique element together with its... CodeCheck Arrays - Simple Exercises, Double Loops
17 While with double While with double AnnEx loops, while loop
18 Color codes for double-sized image Code Completion Consider an image that is composed of a number of colored small squares, each colored in one of these 8... CodeCheck Loops
19 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
20 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