Problem You are given an array \(a_1\),\(a_2\),-,\(a_n\) and an array \(b_1\),\(b_2\),-,\(b_n\). For one operation you can sort in non-decreasing order any subarray \(a[l-r]\) of the array \(a\). For example, if \(a=[4,2,2,1,3,1]\) and you choose sub…
Time limit 2000 ms Memory limit 262144 kB Source Educational Codeforces Round 69 (Rated for Div. 2) Tags dp greedy math *1900 Editorial Announcement (en) Tutorial #1 (en) Tutorial #2 (en) Tutorial #3 (ru) 官方题解 At first let's solve this problem when m…
D. Yet Another Subarray Problem You are given an array \(a_1, a_2, \dots , a_n\) and two integers \(m\) and \(k\). You can choose some subarray \(a_l, a_{l+1}, \dots, a_{r-1}, a_r\). The cost of subarray \(a_l, a_{l+1}, \dots, a_{r-1}, a_r\) is equal…
Let's call an array tt dominated by value vv in the next situation. At first, array tt should have at least 22 elements. Now, let's calculate number of occurrences of each number numnum in tt and define it as occ(num)occ(num). Then tt is dominated (b…
C. Alyona and mex time limit per test: 2 seconds memory limit per test: 256 megabytes input: standard input output: standard output Alyona's mother wants to present an array of n non-negative integers to Alyona. The array should be special. Alyona is…
A. Alyona and mex 题目连接: http://codeforces.com/contest/739/problem/A Description Alyona's mother wants to present an array of n non-negative integers to Alyona. The array should be special. Alyona is a capricious girl so after she gets the array, she…
Description An array of positive integers a1, a2, ..., an is given. Let us consider its arbitrary subarray al, al + 1..., ar, where 1 ≤ l ≤ r ≤ n. For every positive integer s denote by Ks the number of occurrences of s into the subarray. We call the…
[codeforces 528]A. Glass Carving 试题描述 Leonid wants to become a glass carver (the person who creates beautiful artworks by cutting the glass). He already has a rectangular wmm × h mm sheet of glass, a diamond glass cutter and lots of enthusiasm. Wha…
Hacking Cypher Time Limit:1000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 490C Description Polycarpus participates in a competition for hacking into a new secure messenger. He's almost won. Having…
A. Pasha and Stick 题目连接: http://www.codeforces.com/contest/610/problem/A Description Pasha has a wooden stick of some positive integer length n. He wants to perform exactly three cuts to get four parts of the stick. Each part must have some positive…
A. Maximum Increase time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given array consisting of n integers. Your task is to find the maximum length of an increasing subarray of the gi…
B. Lipshitz Sequence Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/601/problem/B Description A function is called Lipschitz continuous if there is a real constant K such that the inequality |f(x) - f(y)| ≤ K·|x - y| hold…
D. Wilbur and Trees Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/596/problem/D Description Wilbur the pig really wants to be a beaver, so he decided today to pretend he is a beaver and bite at trees to cut them down. The…
今天老师(orz sansirowaltz)让我们做了很久之前的一场Codeforces Round #257 (Div. 1),这里给出A~C的题解,对应DIV2的C~E. A.Jzzhu and Chocolate time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Jzzhu has a big rectangular cho…
题目连接:http://codeforces.com/contest/757/problem/D D. Felicity's Big Secret Revealed time limit per test 4 seconds memory limit per test 512 megabytes input standard input output standard output The gym leaders were fascinated by the evolutions which t…
A. Lesha and array splitting time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output One spring day on his way to university Lesha found an array A. Lesha likes to split arrays into several parts.…
Problem Codeforces Round #539 (Div. 2) - D. Sasha and One More Name Time Limit: 1000 mSec Problem Description Input The first line contains one string s (1≤|s|≤5000) — the initial name, which consists only of lowercase Latin letters. It is guarante…
Codeforces 1091D New Year and the Permutation Concatenation https://codeforces.com/contest/1091/problem/D 题目: Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For…
A. Carrot Cakes 题面 In some game by Playrix it takes t minutes for an oven to bake k carrot cakes, all cakes are ready at the same moment t minutes after they started baking. Arkady needs at least n cakes to complete a task, but he currently don't hav…
