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];
        float ave = 0;
        for (int i = 0; i < n; i++) {
            x[i] = sc.nextInt();
            ave += x[i];
        }
        ave = Math.round(ave / x.length);

        int count;
        int counter = 0;
        for (int j = 0; j < x.length; j++) {
            count = x[j] - (int) ave;
            counter += count * count;
        }
        System.out.println(counter);
    }
}
/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