func_code_string: #include <bits/stdc++.h>   using namespace std;   signed long long int a, b;   long long int a1, b1, y, s;   int main() {     cin >> a >> b >> s;     if (a >= 0)       a1 = a;     else       a1 = 0 - a;     if (b >= 0)       b1 = b;     else       b1 = 0 - b;     y = a1 + b1;     if (y - s == 0 || (y - s) % 2 == 0) {       if (s >= y)         cout <<  Yes ;       else         cout <<  No ;     } else       cout <<  No ;   }   