Desiderium **Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 427 Accepted Submission(s): 167 ** Problem Description There is a set of intervals, the size of this set is n. If we select a subset of this set with equal probability, how many the expected length of …

time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Petya loves computer games. Finally a game that he's been waiting for so long came out! The main character of this game has n different skills, each of which is characterized by an integer a__i from 0 to 100. …

B. Luxurious Houses time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output The capital of Berland has n multifloor buildings. The architect who built up the capital was very creative, so all the houses were built in one row. Let's enumerate all the houses from left …

A. Vasya the Hipster time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output One day Vasya the Hipster decided to count how many socks he had. It turned out that he had a red socks and b blue socks. According to the latest fashion, hipsters should wear the socks of …

As I work with students I often face the situation when if a problem doesn't seem clear to a student at the first sight, it makes them unable to solve it. Indeed, you always hear about specific methods and techniques. But you don't hear about how to think in order to apply them. In this note I'll try to sum up my …

In ``Hangman Judge,'' you are to write a program that judges a series of Hangman games. For each game, the answer to the puzzle is given as well as the guesses. Rules are the same as the classic game of hangman, and are given as follows: 1. The contestant tries to solve to puzzle by guessing one letter at a time. 2. …

模拟． 直接搞... 并不明白坑在哪里．．． 排在我前面被hack了１００多人... /************************************************************************* > File Name: code/bc/#57/1001.cpp > Author: 111qqz > Email: rkz2013@126.com > Created Time: 2015年09月26日 星期六 19时04分34 …

比较水． 唯一一点需要注意的是... 可能有重复元素... 因为我的思路是用两棵一维树状数组搞.. 每个点标记为1 然后看矩形的两个方向中是否至少有一个方向上和等于长度... 所以这样如果有重复元素的话，不处理会出错..　但实际上又没修改..直接前缀和就好了．．． 树状数组个毛线．．． 不过看到还有人线段树搞得233333 /************************************************************************* > File Name: code/bc/#57/1002.cpp > Author: 111qqz > Email: …

B. Kefa and Company time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Kefa wants to celebrate his first big salary by going to restaurant. However, he needs company. Kefa has n friends, each friend will agree to go to the restaurant if Kefa asks. Each friend …

一开始迷之wa... 先找出素数下标的上界就可以A... 然后纠结了２０分钟．．． 然后发现是预处理的素数少了一个素数．． 我预处理是处理到＜１０００５的素数．．． 最大数１００００,而超过１００００的第一个素数是１０００７ 这样判断终止条件就会死循环... sad /************************************************************************* > File Name: code/poj/2739.cpp > Author: 111qqz > Email: rkz2013@126.com > Created Time: 2015年09 …