OJ Board

I am confused with this problem, that is, can we press '-' key in the beginning ?
For example, can we display -2 by pressing '-' and '2' ?

I got TLE for the first time. And I also tried the following tips for I/O:


ios_base::sync_with_stdio(0);
cin.tie(0);


But I still got TLE. Finally, I use scanf/printf instead of cin/cout, and got Accepted with 0.142s.
In my experience, the difference between these two approaches wasn't too ...

I think my approach to this problem can run in time limit. I let all the fires move one step before Joe moves until he escapes the maze or he is surrounded by fires.
But actually, I got TLE many times and don't know why. Can someone help me to point where is wrong?


#include <iostream>
#include ...