import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] x = new int[n];
        for(int i = 0; i < n; i++) {
            x[i] = sc.nextInt();
        }
        int sum = 0;
        int point = 0;
        for(int j = 0; j < n; j++) {
            sum += x[j];
        }
        double ave = (double)sum / n;
        if(ave % 1 >= 0.5){
        point = (int)ave + 1;
        }else{
            point = (int)ave;
        }
        long ans = 0;
        for(int i = 0; i < n; i++) {
            ans += ((point - x[i]) * (point - x[i])); 
        }
        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