func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     long long a, b, c;     cin >> a >> b >> c;     a *= 10;     long long q = 0;     for (long long j = 0; j <= 9; j++) {       a += j;       if (a % b == 0) {         q = 1;         break;       } else         a -= j;     }     if (q == 0) {       cout << -1 << endl;       return 0;     }     cout << a;     for (long long i = 0; i < c - 1; i++) cout << 0;   }   