func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int l, r, a;     cin >> l >> r >> a;     int mini = min(l, r);     int maxi = max(l, r);     int diff = maxi - mini;     mini += (diff <= a) ? diff : a;     a -= (diff <= a) ? diff : a;     if (a & 1) a--;     cout << 2 * min(mini, maxi) + a;   }   