func_code_string: #include <bits/stdc++.h>   using namespace std;   int a, b, k;   int main() {     cin >> a >> b >> k;     a %= b;     bool ok = false;     int i;     for (i = 0; i < 1000000; i++) {       a *= 10;       int x = a / b;       a %= b;       if (x == k) {         ok = true;         break;       }     }     if (ok)       cout << i + 1 << endl;     else       cout << -1 << endl;     return 0;   }   