摘要："Duel!" Betting on the lovely princess Claris, the duel between Tokitsukaze and Quailty has started. There are nn cards in a row. Each card has two si 阅读全文

摘要：Recently Luba bought a monitor. Monitor is a rectangular matrix of size n × m. But then she started to notice that some pixels cease to work properly. 阅读全文

摘要：今天的训练一共六道题，训练时间三小时，训练时间内一共做出了一道题，还WA了11次。 反思：1.因为题目没有认真阅读，导致没有正确理解题目，然后一直没写出来，还把心态写炸了。 2.心态问题很严重，已经第二次由于开题不顺，导致正常训练的成绩非常差，这次训练的C题、D题其实都属于简单题系列，D题最后都没来 阅读全文

摘要：You are given two arithmetic progressions: a1k + b1 and a2l + b2. Find the number of integers x such that L ≤ x ≤ R and x = a1k' + b1 = a2l' + b2, for 阅读全文