Problem:
Score : 200 points

Problem Statement

Niwango-kun is an employee of Dwango Co., Ltd.

One day, he is asked to generate a thumbnail from a video a user submitted.

To generate a thumbnail, he needs to select a frame of the video according to the following procedure:

Get an integer N and N integers a_0, a_1, ..., a_{N-1} as inputs. N denotes the number of the frames of the video, and each a_i denotes the representation of the i-th frame of the video.

Select t-th frame whose representation a_t is nearest to the average of all frame representations.

If there are multiple such frames, select the frame with the smallest index.

Find the index t of the frame he should select to generate a thumbnail.

Constraints

1 \leq N \leq 100

1 \leq a_i \leq 100

All numbers given in input are integers

Input

Input is given from Standard Input in the following format:

N
a_{0} a_{1} ... a_{N-1}

Output

Print the answer.

Sample Input 1

3
1 2 3

Sample Output 1

1

Since the average of frame representations is 2, Niwango-kun needs to select the index 1, whose representation is 2, that is, the nearest value to the average.

Sample Input 2

4
2 5 2 5

Sample Output 2

0

The average of frame representations is 3.5.

In this case, every frame has the same distance from its representation to the average.

Therefore, Niwango-kun should select index 0, the smallest index among them.

Solution in JavaScript (node.js v5.12) (judge verdict: Accepted)

function Main(input) {
  const args = input.split('\n');
  const N = parseInt(args[0], 10),
    a = args[1].split(' ').map(n => parseInt(n, 10));

  const aver = a.reduce((p, c) => p + c) / a.length;
  var diff = [];
  var index = 0;

  a.forEach((val, i) => {
    diff[i] = Math.abs(aver - val);
    index = diff[index] <= diff[i] ? index : i;
  });
  console.log(index);
}
Main(require('fs').readFileSync('/dev/stdin', 'utf8'));