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