func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long num, length, devisor = 1, rest;     long long i;     string str;     cin >> str;     length = str.length();     num = atoi(str.c_str());     for (i = 1; i <= length - 1; i++) {       devisor *= 10;     }     rest = num % devisor;     cout << devisor - rest << endl;     return 0;   }   