loven0326的博客

Problem Description Chiaki often participates in international competitive programming contests. The time zone becomes a big problem. Given a time in Beijing time (UTC +8), Chiaki would like to know ...

Problem Description There is a slope on the 2D plane. The lowest point of the slope is at the origin. There is a small ball falling down above the slope. Your task is to find how many times the ball ...

Problem Description Kazari remembered that she had an expression s0 before. Definition of expression is given below in Backus–Naur form. <expression> ::= <number> | <expression> &lt...

Problem Description Eddy's interest is very extensive, recently he is interested in prime number. Eddy discover the all number owned can be divided into the multiply of prime number, but he can't wri...

Problem Description 大家常常感慨，要做好一件事情真的不容易，确实，失败比成功容易多了！ 做好“一件”事情尚且不易，若想永远成功而总从不失败，那更是难上加难了，就像花钱总是比挣钱容易的道理一样。 话虽这样说，我还是要告诉大家，要想失败到一定程度也是不容易的。比如，我高中的时候，就有一个神奇的女生，在英语考试的时候，竟然把40个单项选择题全部做错了！大家都学过概率论，应该知道出现...