func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long a, b, c;     cin >> a >> b >> c;     long long power = 0, l = 0, emp = 1, aa = 0;     for (long long i = 0; i > -1; i++) {       if (i != 0) {         for (long long j = 0; j < i; j++) {           emp = emp * c;         }       }       if (emp >= a && emp <= b) {         cout << emp <<    ;         power++;       }       if (emp > b / c) {         break;       }       emp = 1;     }     if (power == 0) {       cout <<  -1  << endl;     }     return 0;   }   