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全部文章（共943篇）

【CodeForces - 215B 】Olympic Medal （数学，公式推导）

题干： The World Programming Olympics Medal is a metal disk, consisting of two parts: the first part is a ring with outer radius of r1 cm, inner radius ...

2018-11-02

0 573

【CodeForces - 215A】Bicycle Chain （水题）

题干： Vasya's bicycle chain drive consists of two parts: n stars are attached to the pedal axle, m stars are attached to the rear wheel axle. The chain...

2018-11-02

0 388

【ZOJ - 2836 】Number Puzzle （容斥原理）

题干： Given a list of integers (A1, A2, ..., An), and a positive integer M, please find the number of positive integers that are not greater than M and...

2018-11-02

0 453

【CodeForces - 214C 】Game （拓扑排序，思维）

题干： Furik and Rubik love playing computer games. Furik has recently found a new game that greatly interested Rubik. The game consists of n parts and ...

2018-11-01

0 619

【Codeforces 631C 】Report（单调栈，思维模拟）

题干： Each month Blake gets the report containing main economic indicators of the company "Blake Technologies". There are n commodities produ...

2018-11-01

0 392

【CodeForces - 1060C】Maximum Subrectangle （思维，预处理前缀和，dp，枚举长度）

题干： You are given two arrays aa and bb of positive integers, with length nn and mmrespectively. Let cc be an n×mn×m matrix, where ci,j=ai⋅bjci,j=ai⋅...

2018-10-31

0 324

【CodeForces - 1027B 】Numbers on the Chessboard （没有营养的找规律题，无聊题）

题干： You are given a chessboard of size n×nn×n. It is filled with numbers from 11 to n2n2 in the following way: the first ⌈n22⌉⌈n22⌉ numbers from 11 t...

2018-10-31

0 397

【CodeForces - 205B 】Little Elephant and Sorting （思维）

题干： The Little Elephant loves sortings. He has an array a consisting of n integers. Let's number the array elements from 1 to n, then the i-th eleme...

2018-10-31

0 451

【 HDU - 1796】How many integers can you find （容斥原理，二进制枚举或者dfs）

题干： Now you get a number N, and a M-integers set, you should find out how many integers which are small than N, that they can divided exactly by an...

2018-10-31

0 308

【CodeForces - 214B】Hometask （模拟，有坑）

题干： Furik loves math lessons very much, so he doesn't attend them, unlike Rubik. But now Furik wants to get a good mark for math. For that Ms. Ivanov...

2018-10-31

0 718