import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        List<Integer> list = new ArrayList<>();
        double ave = 0;
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            ave += x;
            list.add(x);
        }

        ave = Math.round(ave / n);

        long result = 0;
        for (int i = 0; i < n; i++) {
            result += Math.pow(list.get(i) - ave, 2);
        }

        System.out.println(result);
    }
}
/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