func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a, b;     cin >> a >> b;     while (b) {       int c = b % a;       if (c == 0)         b /= a;       else if (c == 1)         b--;       else if (c == a - 1)         b++;       else         return cout <<  NO , 0;     }     cout <<  YES ;     return 0;   }   