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