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 Go (1.14.1) (judge verdict: Accepted)

package main

import (
	"fmt"
	"math"
)

func main() {
	var N int
	fmt.Scanf("%d", &N)
	ave := 0.0
	ans := 0

	//動的配列
	X := make([]int, N)
	//みんなの座標の平均値（四捨五入）を出して，その距離で計算する
	for i := 0; i < N; i++ {
		fmt.Scanf("%d", &X[i])
		ave += float64(X[i])
	}
	// fmt.Printf("Origin:%f\n", ave)
	ave = math.Round(ave / float64(N))
	// fmt.Printf("after:%f\n", ave)
	for i := 0; i < N; i++ {
		ans += int(math.Pow(ave-float64(X[i]), 2))
	}
	fmt.Println(ans)

}