Problem:
Score : 300 points

Problem Statement

There are N people living on a number line.

The i-th person lives at coordinate X_i.

You are going to hold a meeting that all N people have to attend.

The meeting can be held at any integer coordinate. If you choose to hold the meeting at coordinate P, the i-th person will spend (X_i - P)^2 points of stamina to attend the meeting.

Find the minimum total points of stamina the N people have to spend.

Constraints

All values in input are integers.

1 \leq N \leq 100

1 \leq X_i \leq 100

Input

Input is given from Standard Input in the following format:

N
X_1 X_2 ... X_N

Output

Print the minimum total stamina the N people have to spend.

Sample Input 1

2
1 4

Sample Output 1

5

Assume the meeting is held at coordinate 2. In this case, the first person will spend (1 - 2)^2 points of stamina, and the second person will spend (4 - 2)^2 = 4 points of stamina, for a total of 5 points of stamina. This is the minimum total stamina that the 2 people have to spend.

Note that you can hold the meeting only at an integer coordinate.

Sample Input 2

7
14 14 2 13 56 2 37

Sample Output 2

2354

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int N;
            var a1 = Console.ReadLine().Split(' ');
            var a = Console.ReadLine().Split(' ');
            Int32.TryParse(a1[0], out N);
            var P = new int[N];
            int id = 0;
            foreach (var x in a)
            {
                Int32.TryParse(x, out P[id]);
                //Console.WriteLine(P[id]);
                id++;
            }
            long curPoint = 1000000000000;
            int L = P[0];
            int R = P[0];
            for (var i = 1; i < N; i++)
            {
                L = Math.Min(P[i], L);
                R = Math.Max(P[i], R);
            }
            for (var i = L; i<=R; i++)
            {
                long s = 0;
                foreach (var j in P)
                {
                    s += (j - i) * (j - i);
                }
                curPoint = Math.Min(curPoint, s);
            }
            Console.WriteLine(curPoint);
        }
    }
}