OJ Board

I am pretty sure they have cases like

10.05 10.05 10.05 10.05 3

which in my case made a function return Nan which throws off comparisons. ie

5 < nan is false but 5 >= nan is also false.

Anyway, make sure you handle the case when the x1,y1 and x2, y2 are the exact same.

Wow.

Ok, so in case anyone makes the same silly mistake I did.

There is only a blank line between INPUT cases. Not output.

Each output is just on one line.

I found that out after I made it work for arbitrary whitespace characters as input, ie grids like

4 4
a
aa
aaa
aaaa
3 3

which is ...

While probably obvious to most, just in case.

You need to use 64 bit integers (signed is ok)

A couple hints for those getting WA.

The problem description is misleading, do not use the ` character in the phrase "Peter, you shouldn't have played billiard that much."

Also, I did confirm that exam grades are non decreasing via an assert.

One last thing, you can do the average at the very end ...