My solutions to exercises and tests at http://codility.com.

1. Write a function that, given two integers A and B, returns the leftmost position at which A occurs in B. The function should return -1 if A does not occur in B. 2. Write a function which returns an array which represents number X+1. 3. Write a function that, given a string S (containing only the letters 'A', 'B', and 'C') consisting of N char…