原创 HDU 5187 zhx's contest (高精度快速冪)

Problem Description As one of the most powerful brushes, zhx is required to give his juniors n problems. zhx thinks the

2018-09-03 21:22:33

原创 HDU 3265 Posters

Problem Description Ted has a new house with a huge window. In this big summer, Ted decides to decorate the window with

2018-09-03 21:22:33

原创 Codeforces 1029C Maximal Intersection

You are given n segments on a number line; each endpoint of every segment has integer coordinates. Some segments can de

2018-09-03 21:22:33 3

原创 牛客練習賽25 C 再編號

題目描述 n 個人，每個人有一個編號 ai 。 定義對 a 的再編號爲 a' ，滿足 。 現在有 m 次詢問，每次給定 x,t ，表示詢問經過 t 次再編號後第 x 個人的編號。 由於答案可能很大，所以對 109+7 取模。 輸入描述:

2018-09-03 21:22:33 1

原创 Codeforces 1009D Relatively Prime Graph

Let's call an undirected graph G=(V,E) relatively prime if and only if for each edge (v,u)∈E  GCD(v,u)=1 (the greatest

2018-08-22 04:59:28 3

原创 Hoj 1042 I-KeyBoard

Problem Description Most of you have probably tried to type an SMS message on the keypad of a cellular phone. It is som

2018-08-22 04:59:28

原创 Codeforces 1005F Berland and the Shortest Paths

There are n cities in Berland. Some pairs of cities are connected by roads. All roads are bidirectional. Each road conn

2018-08-22 04:59:28

原创 Wannafly summer camp Day2 L New Game!

題目描述： Eagle Jump公司正在開發一款新的遊戲。瀧本一二三作爲其員工，獲得了提前試玩的機會。現在她正在試圖通過一個迷宮。 這個迷宮有一些特點。爲了方便描述，我們對這個迷宮建立平面直角座標系。迷宮中有兩條平行直線 L1:Ax+By

2018-08-22 04:59:28

原创 區間DP BZOJ 3229石子合併

Description 　　在一個操場上擺放着一排N堆石子。現要將石子有次序地合併成一堆。規定每次只能選相鄰的2堆石子合併成新的一堆，並將新的一堆石子數記爲該次合併的得分。 　　試設計一個算法，計算出將N堆石子合併成一堆的最小得分. In

2018-08-22 04:59:28 2

原创 ZOJ 3593 One Person Game (乘法逆元)

There is an interesting and simple one person game. Suppose there is a number axis under your feet. You are at point A

2018-08-22 04:59:26

原创 Codeforces 1006E Military Problem

In this problem you will have to help Berland army with organizing their command delivery system. There are n officers

2018-08-22 04:59:26 2

原创 牛客小白月賽6 J 洋灰三角

題目描述     洋灰是一種建築材料，常用來築橋搭建高層建築，又稱，水泥、混凝土。     WHZ有很多鑄造成三角形的洋灰塊，他想把這些洋灰三角按照一定的規律放到擺成一排的n個格子裏，其中第i個格子放入的洋灰三角數量是前一個格子的k倍再多

2018-08-22 04:59:26 4

原创 Poj 1704 Georgia and Bob

Description Georgia and Bob decide to play a self-invented game. They draw a row of grids on paper, number the grids fr

2018-08-22 04:59:26 3

原创 Codefrces 1017C. The Phone Number

Mrs. Smith is trying to contact her husband, John Smith, but she forgot the secret phone number! The only thing Mrs. Sm

2018-08-22 04:59:26 1

原创 Codeforces 1016C Vasya And The Mushrooms

Vasya's house is situated in a forest, and there is a mushroom glade near it. The glade consists of two rows, each of w

2018-08-22 04:59:26 3