牛客网暑期ACM多校训练营(第三场)H Diff-prime Pairs (贡献) 链接:https://ac.nowcoder.com/acm/contest/141/H来源:牛客网 Eddy has solved lots of problem involving calculating the number of coprime pairs within some range. This problem can be solved with inclusion-exclusion meth…
2018牛客网暑期ACM多校训练营(第二场)I- car 链接:https://ac.nowcoder.com/acm/contest/140/I来源:牛客网 时间限制:C/C++ 1秒,其他语言2秒 空间限制:C/C++ 131072K,其他语言262144K 64bit IO Format: %lld 题目描述 White Cloud has a square of n*n from (1,1) to (n,n). White Rabbit wants to know the maximum…
Given a sequence of integers a1, a2, ..., an and q pairs of integers (l 1, r1), (l2, r2), ..., (lq, rq), find count(l1, r1), count(l2, r2), ..., count(lq, rq) where count(i, j) is the number of different integers among a 1, a2, ..., ai , aj , aj +…
链接:https://www.nowcoder.com/acm/contest/145/C 来源:牛客网 题目描述 A binary string s of length N = 2n is given. You will perform the following operation n times : - Choose one of the operators AND (&), OR (|) or XOR (^). Suppose the current and s2i. For examp…
链接:https://www.nowcoder.com/acm/contest/147/A来源:牛客网 Niuniu has recently learned how to use Gaussian elimination to solve systems of linear equations. Given n and a[i], where n is a power of 2, let's consider an n x n matrix A. The index of A[i][j] an…
链接:https://www.nowcoder.com/acm/contest/147/D来源:牛客网 Niuniu likes traveling. Now he will travel on a special graph. Given k and n, The directed graph contains n vertices, which are numbered from 0 to n - 1. For the vertex i, and for 1 <= j <= k, ther…
https://www.nowcoder.com/acm/contest/144/G 链接:https://www.nowcoder.com/acm/contest/144/G来源:牛客网 In Viridian forest there is a tree T formed by N nodes, each edge on which has a positive weight. There is an undirected graph G generated from tree T, whi…
链接:https://www.nowcoder.com/acm/contest/140/B来源:牛客网 题目描述 White Rabbit wants to buy some drinks from White Cloud. There are n kinds of drinks, and the price of i-th drink is p[i] yuan per bottle. Since White Cloud is a good friend of White Rabbit, whe…
链接:https://www.nowcoder.com/acm/contest/139/D来源:牛客网 同构图:假设G=(V,E)和G1=(V1,E1)是两个图,如果存在一个双射m:V→V1,使得对所有的x,y∈V均有xy∈E等价于m(x)m(y)∈E1,则称G和G1是同构的,这样的一个映射m称之为一个同构,如果G=G1,则称他为一个自同构. 题目描述 Two undirected simple graphs and where are isomorphic when there exists…
链接:https://www.nowcoder.com/acm/contest/142/G来源:牛客网 The mode of an integer sequence is the value that appears most often. Chiaki has n integers a1,a2,...,an. She woud like to delete exactly m of them such that: the rest integers have only one mode an…
链接:https://www.nowcoder.com/acm/contest/141/J来源:牛客网 Eddy has graduated from college. Currently, he is finding his future job and a place to live. Since Eddy is currently living in Tien-long country, he wants to choose a place inside Tien-long country…
链接:https://www.nowcoder.com/acm/contest/141/A来源:牛客网 Eddy was a contestant participating in ACM ICPC contests. ACM is short for Algorithm, Coding, Math. Since in the ACM contest, the most important knowledge is about algorithm, followed by coding(impl…
链接:https://www.nowcoder.com/acm/contest/141/E来源:牛客网 Eddy likes to play with string which is a sequence of characters. One day, Eddy has played with a string S for a long time and wonders how could make it more enjoyable. Eddy comes up with following…
链接:https://www.nowcoder.com/acm/contest/141/C来源:牛客网 Eddy likes to play cards game since there are always lots of randomness in the game. For most of the cards game, the very first step in the game is shuffling the cards. And, mostly the randomness in…
链接:https://www.nowcoder.com/acm/contest/140/I来源:牛客网 White Cloud has a square of n*n from (1,1) to (n,n). White Rabbit wants to put in several cars. Each car will start moving at the same time and move from one side of one row or one line to the other…
链接:https://www.nowcoder.com/acm/contest/140/D来源:牛客网 White Cloud has built n stores numbered from 1 to n. White Rabbit wants to visit these stores in the order from 1 to n. The store numbered i has a price a[i] representing that White Rabbit can spend…
链接:https://www.nowcoder.com/acm/contest/140/A来源:牛客网 White Cloud is exercising in the playground. White Cloud can walk 1 meters or run k meters per second. Since White Cloud is tired,it can't run for two or more continuous seconds. White Cloud will mo…
链接:https://www.nowcoder.com/acm/contest/139/D来源:牛客网 Two undirected simple graphs and where are isomorphic when there exists a bijection on V satisfying if and only if {x, y} ∈ E2. Given two graphs and , count the number of graphs satisfying the foll…
链接:https://www.nowcoder.com/acm/contest/141/A 来源:牛客网 题目描述 Eddy was a contestant participating in ACM ICPC contests. ACM is short for Algorithm, Coding, Math. Since in the ACM contest, the most important knowledge is about algorithm, followed by codin…
Removal 链接:https://ac.nowcoder.com/acm/contest/139/E来源:牛客网 题目描述 Bobo has a sequence of integers s1, s2, ..., sn where 1 ≤ si ≤ k. Find out the number of distinct sequences modulo (109+7) after removing exactly m elements. 输入描述: The input consists of…
链接:https://ac.nowcoder.com/acm/contest/148/A 来源:牛客网 Rikka with Lowbit 时间限制:C/C++ 5秒,其他语言10秒 空间限制:C/C++ 262144K,其他语言524288K 64bit IO Format: %lld 题目描述 Today, Rikka is going to learn how to use BIT to solve some simple data structure tasks. While study…
链接:https://ac.nowcoder.com/acm/contest/148/J?&headNav=acm 来源:牛客网 Rikka with Nickname 时间限制:C/C++ 2秒,其他语言4秒 空间限制:C/C++ 262144K,其他语言524288K 64bit IO Format: %lld 题目描述 Sometimes you may want to write a sentence into your nickname like "lubenwei niubi…
