C. Alphabetic Removals time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a string ss consisting of nn lowercase Latin letters. Polycarp wants to remove exactly kk characters (k…

C - Alphabetic Removals ≤k≤n≤4⋅105) - the length of the string and the number of letters Polycarp will remove. The second line contains the string s consisting of n lowercase Latin letters. Output Print the string that will be obtained from s after P…

思维题--code forces round# 551 div.2 题目 D. Serval and Rooted Tree time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Now Serval is a junior high school student in Japari Middle School, and he is…

Alphabetic Removals time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a string ss consisting of nn lowercase Latin letters. Polycarp wants to remove exactly kk characters (k≤nk…

Code Forces 796C Bank Hacking 题目大意 给一棵树,有\(n\)个点,\(n-1\)条边,现在让你决策出一个点作为起点,去掉这个点,然后这个点连接的所有点权值+=1,然后再将这些刚刚加过一的点的相邻的点的权值+=1 也就是说,除了与根节点相邻的点+=1,其余点+=2 然后求最大集合的最小点权 solution 一看是要求最大的的最小值,首先想到的就是二分,显然想到这个目前没有什么卵用,二分是用来卡最佳答案的,所以使用二分的前提是要给它一个范围去选择,那么现在的任务就是…

Code Forces 833 A The Meaningless Game 题目大意 有两个人玩游戏,每轮给出一个自然数k,赢得人乘k^2,输得人乘k,给出最后两个人的分数,问两个人能否达到这个分数 不得不吐槽一下那么长的英文题面翻译完只有一句话-- solution 也很好想叭 乘积开立方判断是否为两个数的因数 如果是的话,显然不成立 否则输出Yes即可 #include <iostream> #include <cstring> #include <cstdio>…

题目描述 Programmers working on a large project have just received a task to write exactly mm lines of code. There are nn programmers working on a project, the ii -th of them makes exactly a_{i}ai​ bugs in every line of code that he writes. Let's call a…

Content 给定一个长度为 \(n\) 的仅含小写字母的字符串,执行 \(k\) 次如下操作: 如果字符串中有 a 这个字母,删除从左往右第一个 a,并结束操作,否则继续操作: 如果字符串中有 b 这个字母,删除从左往右第一个 b,并结束操作,否则继续操作: 以此类推,如果所有字母都按照如上方式删除完了,那么结束操作. 现在请你求出操作后的字符串. 数据范围:\(1\leqslant n,k\leqslant 4\times 10^5\). Solution 直接从左往右扫过去,按照上面的方…

Arpa's loud Owf and Mehrdad's evil plan time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output As you have noticed, there are lovely girls in Arpa's land. People in Arpa's land are numbered from 1…

Taxes time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Mr. Funt now lives in a country with a very specific tax laws. The total income of mr. Funt during this year is equal to n (n ≥ 2) bur…