#include #include #include #include #include #include #include #include #include #include using namespace std; struct aaa{aaa(){cin.tie(nullptr); ios::sync_with_stdio(false); cout<ostream &operator<<(ostream &o,const vector&v){o<<"{";for(int i=0;i<(int)v.size();i++)o<<(i>0?", ":"")<> x >> y >> z; if (x > y) swap(x,y); y -= x; cout << x + min(y,z) + max(0, (z-y)/2) << endl; }