import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class Main {

    public static void main(String[] args) throws Exception {

        InputStreamReader is = new InputStreamReader(System.in);
        BufferedReader reader = new BufferedReader(is);

        List<String> mylist = new ArrayList<>();

        // 標準入力からの値を変数strinputに代入
        String strinput = reader.readLine();

        while (strinput != null) {

            mylist.add(strinput);
            strinput = reader.readLine();

        }

        String arr01[] = mylist.get(0).split(" ");
        String arr02[] = mylist.get(1).split(" ");

        int n = Integer.valueOf(arr01[0]);

        int mindata = Integer.MAX_VALUE;

        for (int p = 0; p <= 100; p++) {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        }
        System.out.println(mindata);

    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.ArrayList; ArrayList java.util import java.util.List; List java.util public class Main {

    public static void main(String[] args) throws Exception {

        InputStreamReader is = new InputStreamReader(System.in);
        BufferedReader reader = new BufferedReader(is);

        List<String> mylist = new ArrayList<>();

        // 標準入力からの値を変数strinputに代入
        String strinput = reader.readLine();

        while (strinput != null) {

            mylist.add(strinput);
            strinput = reader.readLine();

        }

        String arr01[] = mylist.get(0).split(" ");
        String arr02[] = mylist.get(1).split(" ");

        int n = Integer.valueOf(arr01[0]);

        int mindata = Integer.MAX_VALUE;

        for (int p = 0; p <= 100; p++) {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        }
        System.out.println(mindata);

    }
} Main public static void main(String[] args) throws Exception {

        InputStreamReader is = new InputStreamReader(System.in);
        BufferedReader reader = new BufferedReader(is);

        List<String> mylist = new ArrayList<>();

        // 標準入力からの値を変数strinputに代入
        String strinput = reader.readLine();

        while (strinput != null) {

            mylist.add(strinput);
            strinput = reader.readLine();

        }

        String arr01[] = mylist.get(0).split(" ");
        String arr02[] = mylist.get(1).split(" ");

        int n = Integer.valueOf(arr01[0]);

        int mindata = Integer.MAX_VALUE;

        for (int p = 0; p <= 100; p++) {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        }
        System.out.println(mindata);

    } main {

        InputStreamReader is = new InputStreamReader(System.in);
        BufferedReader reader = new BufferedReader(is);

        List<String> mylist = new ArrayList<>();

        // 標準入力からの値を変数strinputに代入
        String strinput = reader.readLine();

        while (strinput != null) {

            mylist.add(strinput);
            strinput = reader.readLine();

        }

        String arr01[] = mylist.get(0).split(" ");
        String arr02[] = mylist.get(1).split(" ");

        int n = Integer.valueOf(arr01[0]);

        int mindata = Integer.MAX_VALUE;

        for (int p = 0; p <= 100; p++) {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        }
        System.out.println(mindata);

    } InputStreamReader is = new InputStreamReader(System.in); is new InputStreamReader(System.in) BufferedReader reader = new BufferedReader(is); reader new BufferedReader(is) List<String> mylist = new ArrayList<>(); mylist new ArrayList<>() String strinput = reader.readLine(); strinput reader.readLine() reader.readLine reader while (strinput != null) {

            mylist.add(strinput);
            strinput = reader.readLine();

        } strinput != null strinput null {

            mylist.add(strinput);
            strinput = reader.readLine();

        } mylist.add(strinput) mylist.add mylist strinput strinput = reader.readLine() strinput reader.readLine() reader.readLine reader String arr01[] = mylist.get(0).split(" "); arr01 mylist.get(0).split(" ") mylist.get(0).split mylist.get(0) mylist.get mylist 0 " " String arr02[] = mylist.get(1).split(" "); arr02 mylist.get(1).split(" ") mylist.get(1).split mylist.get(1) mylist.get mylist 1 " " int n = Integer.valueOf(arr01[0]); n Integer.valueOf(arr01[0]) Integer.valueOf Integer arr01[0] arr01 0 int mindata = Integer.MAX_VALUE; mindata Integer.MAX_VALUE Integer Integer.MAX_VALUE for (int p = 0; p <= 100; p++) {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        } int p = 0; int p = 0; p 0 p <= 100 p 100 p++ p++ p {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        } {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        } int mysum = 0; mysum 0 for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            } int j = 0; int j = 0; j 0 j < n j n j++ j++ j {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            } {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            } int temp = Integer.valueOf(arr02[j]); temp Integer.valueOf(arr02[j]) Integer.valueOf Integer arr02[j] arr02 j mysum += Math.pow((temp - p), 2) mysum Math.pow((temp - p), 2) Math.pow Math (temp - p) temp p 2 mindata = Math.min(mindata, mysum) mindata Math.min(mindata, mysum) Math.min Math mindata mysum System.out.println(mindata) System.out.println System.out System System.out mindata String[] args args public class Main {

    public static void main(String[] args) throws Exception {

        InputStreamReader is = new InputStreamReader(System.in);
        BufferedReader reader = new BufferedReader(is);

        List<String> mylist = new ArrayList<>();

        // 標準入力からの値を変数strinputに代入
        String strinput = reader.readLine();

        while (strinput != null) {

            mylist.add(strinput);
            strinput = reader.readLine();

        }

        String arr01[] = mylist.get(0).split(" ");
        String arr02[] = mylist.get(1).split(" ");

        int n = Integer.valueOf(arr01[0]);

        int mindata = Integer.MAX_VALUE;

        for (int p = 0; p <= 100; p++) {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        }
        System.out.println(mindata);

    }
} public class Main {

    public static void main(String[] args) throws Exception {

        InputStreamReader is = new InputStreamReader(System.in);
        BufferedReader reader = new BufferedReader(is);

        List<String> mylist = new ArrayList<>();

        // 標準入力からの値を変数strinputに代入
        String strinput = reader.readLine();

        while (strinput != null) {

            mylist.add(strinput);
            strinput = reader.readLine();

        }

        String arr01[] = mylist.get(0).split(" ");
        String arr02[] = mylist.get(1).split(" ");

        int n = Integer.valueOf(arr01[0]);

        int mindata = Integer.MAX_VALUE;

        for (int p = 0; p <= 100; p++) {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        }
        System.out.println(mindata);

    }
} Main
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class Main {

    public static void main(String[] args) throws Exception {

        InputStreamReader is = new InputStreamReader(System.in);
        BufferedReader reader = new BufferedReader(is);

        List<String> mylist = new ArrayList<>();

        // 標準入力からの値を変数strinputに代入
        String strinput = reader.readLine();

        while (strinput != null) {

            mylist.add(strinput);
            strinput = reader.readLine();

        }

        String arr01[] = mylist.get(0).split(" ");
        String arr02[] = mylist.get(1).split(" ");

        int n = Integer.valueOf(arr01[0]);

        int mindata = Integer.MAX_VALUE;

        for (int p = 0; p <= 100; p++) {

            int mysum = 0;

            for (int j = 0; j < n; j++) {

                int temp = Integer.valueOf(arr02[j]);

                mysum += Math.pow((temp - p), 2);

                //                System.out.println(p + " " + temp + " " + mysum);

            }

            mindata = Math.min(mindata, mysum);

        }
        System.out.println(mindata);

    }
}
