func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a, b, a2 = 0, b2 = 0, a3 = 0, b3 = 0, a5 = 0, b5 = 0;     cin >> a >> b;     while (a % 2 == 0) {       a2++;       a /= 2;     }     while (a % 3 == 0) {       a3++;       a /= 3;     }     while (a % 5 == 0) {       a5++;       a /= 5;     }     while (b % 2 == 0) {       b2++;       b /= 2;     }     while (b % 3 == 0) {       b3++;       b /= 3;     }     while (b % 5 == 0) {       b5++;       b /= 5;     }     if (a == b) {       cout << abs(a2 - b2) + abs(a3 - b3) + abs(a5 - b5) << endl;     } else {       cout << -1 << endl;     }   }   