import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 数値
		int n1 = sc.nextInt();
		double d1 = 0.0;
		int n1list[] = new int[n1];
		for (int i = 1; i <= n1; i++) {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		}

		// 開催場所
		int intd1 = (int) Math.round(d1);
		int score = 0;
		for (int i = 1; i <= n1; i++) {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		}

		System.out.println(score);

	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 数値
		int n1 = sc.nextInt();
		double d1 = 0.0;
		int n1list[] = new int[n1];
		for (int i = 1; i <= n1; i++) {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		}

		// 開催場所
		int intd1 = (int) Math.round(d1);
		int score = 0;
		for (int i = 1; i <= n1; i++) {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		}

		System.out.println(score);

	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 数値
		int n1 = sc.nextInt();
		double d1 = 0.0;
		int n1list[] = new int[n1];
		for (int i = 1; i <= n1; i++) {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		}

		// 開催場所
		int intd1 = (int) Math.round(d1);
		int score = 0;
		for (int i = 1; i <= n1; i++) {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		}

		System.out.println(score);

	} main {
		Scanner sc = new Scanner(System.in);
		// 数値
		int n1 = sc.nextInt();
		double d1 = 0.0;
		int n1list[] = new int[n1];
		for (int i = 1; i <= n1; i++) {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		}

		// 開催場所
		int intd1 = (int) Math.round(d1);
		int score = 0;
		for (int i = 1; i <= n1; i++) {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		}

		System.out.println(score);

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n1 = sc.nextInt(); n1 sc.nextInt() sc.nextInt sc double d1 = 0.0; d1 0.0 int n1list[] = new int[n1]; n1list new int[n1] n1 for (int i = 1; i <= n1; i++) {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		} int i = 1; int i = 1; i 1 i <= n1 i n1 i++ i++ i {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		} {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		} int n2 = sc.nextInt(); n2 sc.nextInt() sc.nextInt sc n1list[i - 1] = n2 n1list[i - 1] n1list i - 1 i 1 n2 d1 += (double) n2 / (double) n1 d1 (double) n2 / (double) n1 (double) n2 (double) n1 int intd1 = (int) Math.round(d1); intd1 (int) Math.round(d1) Math.round Math d1 int score = 0; score 0 for (int i = 1; i <= n1; i++) {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		} int i = 1; int i = 1; i 1 i <= n1 i n1 i++ i++ i {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		} {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		} score += Math.pow(n1list[i - 1] - intd1, 2) score Math.pow(n1list[i - 1] - intd1, 2) Math.pow Math n1list[i - 1] - intd1 n1list[i - 1] n1list i - 1 i 1 intd1 2 System.out.println(score) System.out.println System.out System System.out score String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 数値
		int n1 = sc.nextInt();
		double d1 = 0.0;
		int n1list[] = new int[n1];
		for (int i = 1; i <= n1; i++) {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		}

		// 開催場所
		int intd1 = (int) Math.round(d1);
		int score = 0;
		for (int i = 1; i <= n1; i++) {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		}

		System.out.println(score);

	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 数値
		int n1 = sc.nextInt();
		double d1 = 0.0;
		int n1list[] = new int[n1];
		for (int i = 1; i <= n1; i++) {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		}

		// 開催場所
		int intd1 = (int) Math.round(d1);
		int score = 0;
		for (int i = 1; i <= n1; i++) {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		}

		System.out.println(score);

	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 数値
		int n1 = sc.nextInt();
		double d1 = 0.0;
		int n1list[] = new int[n1];
		for (int i = 1; i <= n1; i++) {
			int n2 = sc.nextInt();
			n1list[i - 1] = n2;
			d1 += (double) n2 / (double) n1;
		}

		// 開催場所
		int intd1 = (int) Math.round(d1);
		int score = 0;
		for (int i = 1; i <= n1; i++) {
			score += Math.pow(n1list[i - 1] - intd1, 2);
		}

		System.out.println(score);

	}
}
