import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		double[] x = new double[n];
		double ave=0;
		int sum=0;
		
		for(int i=0;i<n;i++) {
			x[i]=sc.nextInt();
			ave+=x[i];
		}
		
		long p=0;
		
		p=Math.round(ave/n);
		
		for(int i=0;i<n;i++) {
			sum+=(Math.pow((x[i]-p), 2));
		}
		
		System.out.println(sum);
		sc.close();
	}
}
/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