숫자의 합

#include <iostream>
using namespace std;

int main()
{
	char str[100] = { 0 };
	int i, num;
	int sum = 0;

	cin >> num;
	cin >> str;

	for (i = 0; i < num; i++)
	{
		sum += str[i]-'0';
	}
	cout << sum << '\n';
	return 0;
}