题目链接： https://codeforces.com/contest/976/problem/A 题目： String can be called correct if it consists of characters “0” and “1” and there are no redundant leading zeroes. Here are some examples: ...

题目链接： https://exam.upc.edu.cn/problem.php?id=5155 题目： 题目描述 You are in charge of the security for a large building. The building has a map, consisting of rooms, and doors between the rooms. Eac...

题目链接： https://codeforces.com/gym/101635/attachments 题目： 题目描述 As Jacques-Édouard really likes birthday cakes, he celebrates his birthday every hour, instead of every year. His friends ordered h...

题目链接： https://codeforces.com/gym/101635/attachments 题目： 题目描述 The chef of a restaurant aspiring for a Michelin star wants to display a selection of her signature dishes for inspectors. For this...

  今天的训练赛本来可以出8个题，但是因为我个人的问题导致A题写残了，F题没交上。   B题队友跟我说了一声可能是最大权闭合子图，我大概瞟了一眼觉得有点像，但是没有多想，就去开当时还没人交的A题了，结果一顿乱敲写完之后测了几组样例发现有没过的，以为是想错了，想了一会没想出来就着手写B了，很简单的最大权闭合子图写了接近半小时，写完之后还剩50分钟开始写F，五十几行代码写了40分钟，Debug...

题目链接： https://exam.upc.edu.cn/problem.php?id=5124 题目： 题目描述 Flow Free is a puzzle that is played on a 2D grid of cells, with some cells marked as endpoints of certain colors and the rest of cel...

题目链接： https://exam.upc.edu.cn/problem.php?id=5121 题目： 题目描述 Alice and Bob are in their class doing drills on multiplication and division. They quickly get bored and instead decide to play a gam...

题目链接： https://exam.upc.edu.cn/problem.php?id=5122 题目： 题目描述 Mapping applications often represent the boundaries of countries, cities, etc. as polylines, which are connected sequences of line se...

题目链接： https://exam.upc.edu.cn/problem.php?id=5120 题目： 题目描述 Open-pit mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borr...

题目链接： https://www.luogu.org/problemnew/show/P1417 题目： 题目背景 由于你的帮助，火星只遭受了最小的损失。但gw懒得重建家园了，就造了一艘飞船飞向遥远的earth星。不过飞船飞到一半，gw发现了一个很严重的问题：肚子饿了~ gw还是会做饭的，于是拿出了储藏的食物准备填饱肚子。gw希望能在T时间内做出最美味的食物，但是这些食物美味...