[BOJ] 11720. 숫자의 합 [구현] - c++

https://www.acmicpc.net/problem/11720

int main(){
    int n;
    cin >> n;
    char ch;
    int sum =0;
    for(int i=0; i<n; i++){
        cin >> ch;
        sum += (ch - '0');
    }
    
    cout << sum;
    return 0;
}