Array of size n, with one element n/2 times

Question

Given an array of n integers, where one element appears more than n/2 times. We need to find that element in linear time and constant extra space.

YAAQ: Yet another arra

Answer 1

Find the median, it takes O(n) on an unsorted array. Since more than n/2 elements are equal to the same value, the median is equal to that value as well.