func_code_string: #include <bits/stdc++.h>   using namespace std;   long long func(long long a, long long b, long long c) {     if (a % 2 != b % 2) return (1ll << 60);     long long x = min(a + c, b + c);     return a + b + c - x;   }   int main(void) {     int i;     long long a, b, c;     cin >> a >> b >> c;     long long ans = (1ll << 60);     ans = min(ans, func(a, b, c));     ans = min(ans, func(b, c, a));     ans = min(ans, func(c, a, b));     if (ans == (1ll << 60)) return -1;     cout << ans << endl;     return 0;   }   