import java.util.*;
public class Main{
  public static void main (String args[]){
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    double[] list = new double[n];
    
    double sum = 0;
    for (int i = 0; i < n; i++){
      list[i] = sc.nextDouble();
      sum += list[i];
    }
    
    long p = Math.round(sum/n);
    
    double ans = 0;
    for (int i = 0; i < n; i++){
      double d = Math.pow(list[i]-p, 2);
      ans += d;
    }
    
    System.out.print((int)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