#include <bits/stdc++.h>
using namespace std;

string s;
long long num, ans;
long long f = 1;

int main(){
    freopen("string.in", "r", stdin);
    freopen("string.out", "w", stdout);

    scanf("%s", s);

}

warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘std::string’ {aka ‘std::__cxx11::basic_string’}