func_code_string: #include <bits/stdc++.h>   using namespace std;   double eps = 1e-6;   double pi = acos(0.0) * 2;   double dinf = 1e250;   long long INF = static_cast<long long>(2e18);   long long inf = static_cast<long long>(1e9 + 7);   long long gcd(long long a, long long b) { return b ? gcd(b, a % b) : a; }   template <class T>   void OUT(T a) {     cout << a;     exit(0);   }   mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());   long long extgcd(long long a, long long b, long long& x, long long& y) {     if (a == 0) {       x = 0;       y = 1;       return b;     }     long long x1, y1;     long long d = extgcd(b % a, a, x1, y1);     x = y1 - (b / a) * x1;     y = x1;     return d;   }   int32_t main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     long long n;     cin >> n;     for (long long i = 0; i < n; i++) {       long long x, y, k;       cin >> x >> y >> k;       if (x < 0) x = -x;       if (y < 0) y = -y;       if (x < y) swap(x, y);       if (x > k)         cout << -1 << endl;       else {         if ((x & 1) != (y & 1)) {           k -= 1;           x -= 1;         } else if ((x & 1) != (k & 1)) {           x -= 1;           y -= 1;           k -= 2;         }         cout << k << endl;       }     }     return 0;   }   