[C++] 백준11720 숫자의 합

#include <iostream>
using namespace std;
int main() {
	int n, res=0;
	char str[101];

	cin >> n;
	cin >> str;

	for (int i = 0; i < n; i++) {
		res += str[i] - '0';
	}
	cout << res;

	return 0;
}