#include <bits/stdc++.h>   using namespace std;   int main() {     int a, b, s;     scanf( %d%d%d , &a, &b, &s);     int req = abs(a) + abs(b);     if (req > s) {       printf( No n );     } else {       int cur = s - req;       if (cur & 1) {         printf( No n );       } else {         printf( Yes n );       }     }     return 0;   }   