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woah! that's really a long test case! How did you make that test case?

However I managed to know the bug in my code and I got AC, thanks to your test case, brianfry713!

Thanks for your response! I have tried your suggestion and use getline instead of getchar. But the result is still WA. I think the problem is in my segment tree. But I can't find it.

Hello guys! I need help for this problem. I made a solution for this problem but I keep getting WA. Can someone give me the test case that make my solution fails or can someone show me where my code flaws are. Here is my solution http://pastebin.com/M7h109Cx

Thanks a lot !