import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int total = 0;
		int pow = 0;
		int av = 0;
		int[] X = new int[N];
		for (int i = 0; i < N; i++) {
			X[i] = sc.nextInt();
			total += X[i];
		}
		if ((10*total/N)%10 < 5) {
			av = total/N;
		} else {
			av = total/N + 1;
		}
		for (int x : X) {
			int p = x - av;
			pow += p*p;
		}
		System.out.println(pow);
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz