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];
        for(int i = 0; i < N; i++) X[i] = Integer.parseInt(sc.next());
        int result = 10000000;
        for(int i = 1; i <= 100; i++ ) {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        }

        System.out.println(result);
    }
} import java.util.Scanner; Scanner 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] = Integer.parseInt(sc.next());
        int result = 10000000;
        for(int i = 1; i <= 100; i++ ) {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        }

        System.out.println(result);
    }
} 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] = Integer.parseInt(sc.next());
        int result = 10000000;
        for(int i = 1; i <= 100; i++ ) {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        }

        System.out.println(result);
    } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] X = new int[N];
        for(int i = 0; i < N; i++) X[i] = Integer.parseInt(sc.next());
        int result = 10000000;
        for(int i = 1; i <= 100; i++ ) {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        }

        System.out.println(result);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int[] X = new int[N]; X new int[N] N for(int i = 0; i < N; i++) X[i] = Integer.parseInt(sc.next()); int i = 0; int i = 0; i 0 i < N i N i++ i++ i X[i] = Integer.parseInt(sc.next()); X[i] = Integer.parseInt(sc.next()) X[i] X i Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int result = 10000000; result 10000000 for(int i = 1; i <= 100; i++ ) {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        } int i = 1; int i = 1; i 1 i <= 100 i 100 i++ i++ i {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        } {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        } int sum = 0; sum 0 for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i); int j = 0; int j = 0; j 0 j < N j N j++ j++ j sum += (X[j] - i) * (X[j] - i); sum += (X[j] - i) * (X[j] - i) sum (X[j] - i) * (X[j] - i) (X[j] - i) X[j] X j i (X[j] - i) X[j] X j i result = Math.min(result, sum) result Math.min(result, sum) Math.min Math result sum System.out.println(result) System.out.println System.out System System.out result String[] args args 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] = Integer.parseInt(sc.next());
        int result = 10000000;
        for(int i = 1; i <= 100; i++ ) {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        }

        System.out.println(result);
    }
} 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] = Integer.parseInt(sc.next());
        int result = 10000000;
        for(int i = 1; i <= 100; i++ ) {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        }

        System.out.println(result);
    }
} Main
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];
        for(int i = 0; i < N; i++) X[i] = Integer.parseInt(sc.next());
        int result = 10000000;
        for(int i = 1; i <= 100; i++ ) {
            int sum = 0;
            for(int j = 0; j < N; j++) sum += (X[j] - i) * (X[j] - i);
            result = Math.min(result, sum);
        }

        System.out.println(result);
    }
}
