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 C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace Atcoder
{
    class aaaa
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            string[] rawAinput = Console.ReadLine().Split(' ');
            double[] Ainput = rawAinput.Select(double.Parse).ToArray();

            //aアベレージ出す
            double Aave = Ainput.Average();

            //forループ回して最も平均にちかい物を調べる
            int ansnum = 101;double diff2 = 0; int daburi = 1;
            for (int i = 0;i<N;i++){
                double diff = 0;
                diff = Math.Abs(Ainput[i] - Aave);
                
                if(ansnum > diff){//個々の処理が大切
                    //todoフレームが複数ある場合
                    ansnum = Convert.ToInt32(Ainput[i]);

                    diff2 = diff;//一回目のダブり判定用
                }else if (diff == diff2){
                    daburi++;
                }

            }

            if (N == daburi){
                Console.WriteLine(0);
            }
            else{
                Console.WriteLine(ansnum);
            }
        }
    }
}