zhangxixi的博客

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15728520.html 题目链接 题目 This is yet another problem on regular bracket sequences. A bracket sequence is called regular, if by inserting “+” and “1” into it we get a correct mathematical expression. For example, sequences “(())()...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15724793.html 题目链接 题目 Certainly, everyone is familiar with tic-tac-toe game. The rules are very simple indeed. Two players take turns marking the cells in a 3 × 3 grid (one player always draws crosses, the other — noughts). Th...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15724727.html 题目链接 题目 古埃及，人们使用单位分数的和（形如 1a\dfrac{1}{a}a1​ 的，aaa 是自然数）表示一切有理数。如：23=12+16\dfrac{2}{3} = \dfrac{1}{2} + \dfrac{1}{6}32​=21​+61​，但不允许 23=13+13\dfrac{2}{3} = \dfrac{1}{3} + \dfrac{1}{3}32​=31​+31​，因为加数中有相同的。对于一个分数 a...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15720689.html 题目链接 题目 A group of tourists is going to kayak and catamaran tour. A rented lorry has arrived to the boat depot to take kayaks and catamarans to the point of departure. It’s known that all kayaks are of the same s...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15720399.html 题目链接 题目 There is a square matrix n × n, consisting of non-negative integer numbers. You should find such a way on it that starts in the upper left cell of the matrix; each following cell is to the right or down ...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15716567.html T1 Closest Cow Wins 题目 Farmer John owns a long farm along the highway that can be considered somewhat like a one-dimensional number line. Along the farm, there are KKK grassy patches (1≤K≤2⋅1051 \leq K \leq 2\cd...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15716558.html 题目 The cows are hard at work trying to invent interesting new games to play. One of their current endeavors involves a set of NNN intervals (1≤N≤2⋅1051\le N\le 2\cdot 10^51≤N≤2⋅105), where the iiith interval star...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15716522.html 题目 Farmer John’s farm consists of a set of NNN fields (1≤N≤105)(1 \leq N \leq 10^5)(1≤N≤105), conveniently numbered 1…N1 \ldots N1…N. Between these fields are MMM bi-directed paths (0≤M≤105)(0 \leq M \leq 10^5)(...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15716487.html 题目 Farmer John owns a long farm along the highway that can be considered somewhat like a one-dimensional number line. Along the farm, there are KKK grassy patches (1≤K≤2⋅1051 \leq K \leq 2\cdot 10^51≤K≤2⋅105); t...

本文搬运自本人初中博客园博客，若图片加载不出来，可到原文查看：https://www.cnblogs.com/zhangtingxi/p/15716414.html T1 Lonely Photo 题目 Farmer John has recently acquired N new cows (3≤N≤5×105), each of whose breed is either Guernsey or Holstein. The cows are currently standing in a line, and Farmer John wants take a photo of ev...