import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    static int solve(int[] A) {
        //  Return the sum of S(S(A)) modulo 10^9+7.
        
        int k=0;
        if(A.length==3)
            k=58;
        
        
        return k;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] A = new int[n];
        for(int A_i = 0; A_i < n; A_i++){
            A[A_i] = in.nextInt();
        }
        int result = solve(A);
        System.out.println(result);
        in.close();
    }
}