Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.
You may assume that the array is non-empty and the majority element always exist in the array.
Move from both side to center
- Initialize an element m and a counter i with i = 0
- For each element x of the input sequence:
- If i = 0, then assign m = x and i = 1
- else if m = x, then assign i = i + 1
- else assign i = i − 1
- Return m