摘要：
Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He sta... 阅读全文
摘要：
Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a numb 阅读全文
摘要：
昨天没看新知识，做了做题，题目很难，一个人题扣了一天，看着别人写的dfs，我就按照深搜的思路写，但是写到最后我开始慌了，因为一天写不出来的题，是不是难题，是不是我没见过的知识点，我后来想还是按照我最开始的想法去写... 阅读全文
摘要：
There is a programming language in which every program is a non-empty sequence of "" signs and digits. Let... 阅读全文
摘要：
There is a programming language in which every program is a non-empty sequence of "<" and ">" signs and digits. Let's explain how the interpreter of t 阅读全文