import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int X[] = new int[N];
        int sum = 0;
        int ans = 0;
        for (int i = 0 ; i< N ; i++){
            X[i] = sc.nextInt();
            sum = sum + X[i];
        }
        double x =(double) sum/N;
        double M =Math.round(x);
        int ans1 = 0;
        for (int i= 0 ; i< X.length;i++ ){
            ans1=X[i];
            ans +=(int) Math.pow(ans1-M,2);
        }
        System.out.println(ans);
    }
}

/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