题目描述 She says that any Pavarotti among the nightingales will serenade his mate while she sits on her eggs. She says that any excited database can answer the queries efficiently.You are given the two dimensional database as a matrix A with n rows and…

Problem G. Garden Gathering Input file: standard input Output file: standard output Time limit: 3 seconds Memory limit: 512 megabytes Many of you may have been to St. Petersburg, but have you visited Peterhof Palace? It is a collection of splendid pa…

Problem D. Delay Time Input file: standard input Output file: standard output Time limit: 1 second Memory limit: 512 megabytes Petr and Egor are measuring the gravitational acceleration g on their physics lessons using a special device. An electromag…

The so-called best problem solver can easily solve this problem, with his/her childhood sweetheart. It is known that y=(5+2 *sqrt(6))^(1+2^x) For a given integer x(0≤x<2^32) and a given prime number M(M≤46337), print [y]%M. ([y]means the integer part…

I. Illegal or Not? time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output The Schengen Agreement was signed by a number of countries to uniform many visa-related questions and to allow tourists fr…

K. King's Rout time limit per test 4 seconds memory limit per test 512 megabytes input standard input output standard output The great rout will be held this evening in the palace of his majesty Nassah II, the king of Occorom. There are n guests invi…

H. Hashing time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output In this problem you are given a byte array a. What you are going to do is to hash its subsequences. Fortunately you don't have to…

C. Colder-Hotter time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output This is an interactive problem. Egor and Petr are playing a game called «Colder-Hotter» on a 2D plane. At the beginning of t…

A. Anagrams time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output Consider the positional numeral system with a given base b. A positive integer x is called b-anagram of a positive integer y if t…

传送门 B. Dudu's maze 题意: 是什么鬼东西???我读题可以读半小时QAQ 给出一张无向图,一个人在里面收集糖果,每个点都有一个糖果,特殊点除外.当他第一次进入特殊点时,会随机往一条边走:之后再进入特殊点时,直接退出. 问最后期望获得的糖果数为多少. 思路: 注意到这个人肯定会贪心走的,即是每次到一个连通块,肯定要把里面的糖果都拿完,然后再选一个随机走. 不管往哪个方向,还是类似地贪心走,将那个连通块走完. 所以就两次\(dfs\)好了,第一次\(dfs\)首先求出第一个连通块,然…