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Can anybody tell why this code gives WA ?? I am posting after applying many test cases. I have no idea now . Please help

Removed After AC. Thanks to brianfry713. For others it may be helpful that there are overlapping schedules like below. Considered those and got AC
input:
4
10:00 12:00 Lectures ...

Thanks, very much. Resubmitted and got accepted now.

Please Help, this is the third problem that I am stuck on PE . I have posted others in respective threads. Why this code gives PE?. I have tried with trailing spaces up to maximum length for last column , then trailing spaces up to maximum available space and even with out trailing spaces!!! Now I ...

Sorry for the previous post . I posted full code this time.

Sorry I posted full code this time.

Can anybody tell why this code gives PE ?? I have looked for every possible case but every time it gives just PE. This same thing is happening with problem 628 also. I have posted about that problem in related thread too. Please help. Thanx in advance


Removed after AC . Codes were fine.There was ...

Can anybody tell why this code gives PE ?? I have looked for every possible case but every time it gives just PE. This same thing is happening with problem 10168 also. I have posted about that problem in related thread too. Please help. Thanx in advance


Removed after AC . Codes were fine.There ...