Hi All I'm getting a timeout error for this question. As far as I can tell my algorithm is the same as the one in the tutorial and it's implemented in C++ so I'm at a loss for why it's not fast enough. Moreover when I change from reading in the input to automatically generating an input the same size it takes 13ms and the question allows 1000ms/1s.

In practise I'm reading through the rows of a 1000x1000 matrix one at a time and then the columns one at a time. In my head this should be about 2 million operations (I've heard 10^9 is usually the upper limit to avoid).

My code is here http://codeforces.net/contest/738/submission/22423987. Any help would be greatly appreciated.

Jon

P.S. It seems like my code is coming out without any kind of spacing. How do I correct this?