/in/foo.cc: In function 'int query(int, int, int)':
/in/foo.cc:70:15: warning: overflow in implicit constant conversion [-Woverflow]
     int ans = INF;
               ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:112:17: warning: overflow in implicit constant conversion [-Woverflow]
     weight[1] = INF;
                 ^~~