https://www.hackerrank.com/challenges/compress-the-string
In this task, we would like for you to appreciate the usefulness of the groupby() function of itertools.
You are given a string S. Suppose a character 'c' occurs consecutively X times in the string. Replace these consecutive occurrences of the character 'c' with (X, c) in the string.
Input Format
A single line of input consisting of the string S.
Output Format
A single line of output consisting of the modified string.
Sample Input 0
1222311
Sample Output 0
(1, 1) (3, 2) (1, 3) (2, 1)