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Making All Elements of Array Equal

 2 years ago
source link: http://codeforces.com/blog/entry/99019
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Making All Elements of Array Equal

Given an Array of N elements and we want to make all elements in array equal we can do 2 following operations

  1. increase any element by 1
  2. decrease any element by 1

What is the minimum number of operation we can do to make all elements in array equal. ?

I tried this problem and found that making every element equal to the median of array is optimal is there any proof for this. ?


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