Recently, there are many cheaters appearing on Luogu, including the famous PinkieRabbit, which means even a country as strong as China could have a lot of cheaters. So, blindly targeting some people based on their country is not right. We might hurt innocent people and let real cheaters escape.

My name is d1312 which means I want to reach 1312 rating at the end of the year. Please tell me how to do that.

I heard STL is a good tool, so I installed STL on my compiler. The problem is, when I use deque, everything is fine. But when I use destack, it gives me this error:

[Error] destack: No such file or directory
compilation terminated.

I'm using the last version of MinGW GCC installed with the MinGW GCC Package Manager, with compile flags -std=c++14 -O2. My friend also have this problem. So please help.

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I thought here were not many Div.1 rounds in summer vacation, and there have been even less now (the last Div.1 is on August 1st), is there a specific reason for this or just I'm being too impatient?