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