백준 6단계 no.2

import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        int[] arr = new int[n];

        String input = sc.next();

        for (int i = 0; i < arr.length; i++) {
            arr[i] = input.charAt(i)-48;
        }

        int sum = 0;
        for (int i =0; i< arr.length; i++) {
            sum += arr[i];
        }

        System.out.println(sum);
    }
}