C++(씨쁠쁠)(cplusplus)-백준(baekjoon)(BaekJoon)코딩 11720번:숫자의 합 답

#include <iostream>
#include <string>
using namespace std;
int main() {
    int sum = 0, num;
    string k;
    cin >> num;
    cin >> k;
    for (int i = 0; i < num; i++)
    {
        for (int j = 0; j <= 9; j++)
        {
            if (k[i] == '0'+j)
            {
                sum += j;
            }
        }
    }
    cout << sum<<'\n';
}