题目大意 给定 $n$($1\le n\le 24$)个正整数 $a_1,\dots, a_n$ 判断 $a_1$ 到 $a_n$ 是否可能为连续 $n$ 个月份的天数. 解法 由于 $n\le 24$,这 $n$ 个月包含在至多 3 年内,而三年的可能情况有: 闰年-平年-平年 平年-闰年-平年 平年-平年-闰年 平年-平年-平年 将这四种模式合并起来: 平年-平年-平年-闰年-平年-平年 将输入月份序列在上述模式中做匹配. 比赛时我的错误做法 没有考虑到这些月份可能包含在 3 年内,误认为包…

A. Splitting in Teams time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There were n groups of students which came to write a training contest. A group is either one person who can write the…

B. Months and Years   time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Everybody in Russia uses Gregorian calendar. In this calendar there are 31 days in January, 28 or 29 days in February (…

[链接] 我是链接,点我呀:) [题意] 在这里输入题意 [题解] 闰,平,平 平,闰,平 平,平,闰 平,平,平 4种情况都考虑到就好. 可能有重复的情况. 但是没关系啦. [代码] #include <bits/stdc++.h> using namespace std; const int N = 24; int p[12] = {31,28,31,30,31,30,31,31,30,31,30,31}; int r[12] = {31,29,31,30,31,30,31,31,30,3…

题目链接: http://codeforces.com/contest/724 A. Checking the Calendar time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given names of two days of the week. Please, determine whether it is…

[codeforces 260]B. Ancient Prophesy 试题描述 A recently found Ancient Prophesy is believed to contain the exact Apocalypse date. The prophesy is a string that only consists of digits and characters "-". We'll say that some date is mentioned in the P…

D. Max and Bike Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/595/problem/D Description For months Maxim has been coming to work on his favorite bicycle. And quite recently he decided that he is ready to take part in a cy…

C. Four Segments 题目连接: http://codeforces.com/contest/14/problem/C Description Several months later Alex finally got his brother Bob's creation by post. And now, in his turn, Alex wants to boast about something to his brother. He thought for a while,…

上一次我们拿学校的URP做了个小小的demo.... 其实我们还可以把每个学生的证件照爬下来做成一个证件照校花校草评比 另外也可以写一个物理实验自动选课... 但是出于多种原因,,还是绕开这些敏感话题.. 今天,我们来扒一下cf的题面! PS:本代码不是我原创 1. 必要的分析 1.1 页面的获取 一般情况CF的每一个 contest 是这样的: 对应的URL是:http://codeforces.com/contest/xxx 还有一个Complete problemset页面,它是这样的:…

http://codeforces.com/contest/738/problem/D Galya is playing one-dimensional Sea Battle on a 1 × n grid. In this game a ships are placed on the grid. Each of the ships consists of bconsecutive cells. No cell can be part of two ships, however, the shi…