Problem: N/3 Repeat Number
You’re given a read only array of n integers. Find out if any integer occurs more than n/3 times in the array in linear time and constant additional space.
If so, return the integer. If not, return -1.
If there are multiple solutions, return any one.
Input : [1 2 3 1 1] Output : 1 1 occurs 3 times which is more than 5/3 times.