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