func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int a, b, s;     cin >> a >> b >> s;     if (s < abs(a) + abs(b))       cout <<  NO  << endl;     else if (s == abs(a) + abs(b))       cout <<  YES  << endl;     else {       s -= abs(a);       s -= abs(b);       if (s % 2 == 0)         cout <<  YES  << endl;       else         cout <<  NO  << endl;     }     return 0;   }   