A - ABCxxx Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement This contest, AtCoder Beginner Contest, is abbreviated as ABC. When we refer to a specific round of ABC, a three-digit number is appended after ABC. For example,…

A - ABC/ARC Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement Smeke has decided to participate in AtCoder Beginner Contest (ABC) if his current rating is less than 1200, and participate in AtCoder Regular Contest (ARC) oth…

AtCoder Regular Contest 151 A. Equal Hamming Distances 简单题,注意下答案需要字典序最小即可 #include<bits/stdc++.h> using namespace std; #define rep(i,l,r) for(int i=l,_##i=r;i<=_##i;i++) #define ll long long signed main() { int n; string a, b; cin >> n >…

D - Ears 题目链接:D - Ears 大意:你在一个\(0-L\)的数轴上行走,从整数格出发,在整数格结束,可以在整数格转弯.每当你经过坐标为\(i-0.5\)的位置时(\(i\)是整数),在\(i\)的位置放置一个石子.现在给出最后的石子序列,但这个序列有可能是不合法的,定义一次操作是将第\(i\)个位置上记录的石子\(-1\)或\(+1\),求最少的操作数使得给定序列成为一个合法序列 分析: 我们记录一次行走的起点为\(S\),终点为\(T\),在这次行走中到达的最左边的点为\(L\…

题目链接:http://abc069.contest.atcoder.jp/assignments A - K-City Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement In K-city, there are n streets running east-west, and m streets running north-south. Each street running east-w…

A - Addition and Subtraction Easy Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement Joisino wants to evaluate the formula "A op B". Here, A and B are integers, and the binary operator op is either + or -. Your task is…

题目链接:http://abc070.contest.atcoder.jp/assignments A - Palindromic Number Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement You are given a three-digit positive integer N.Determine whether N is a palindromic number.Here, a…

A - Haiku Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement As a New Year's gift, Dolphin received a string s of length 19.The string s has the following format: [five lowercase English letters],[seven lowercase English le…

A - Remaining Time Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement Dolphin loves programming contests. Today, he will take part in a contest in AtCoder.In this country, 24-hour clock is used. For example, 9:00 p.m. is re…

刚开始的时候被E题卡住了,不过发现是个数学题后就开始使劲推式子,幸运的是推出来了,之后的F题更是树形DP换根的模板吧,就草草的过了,看了一眼G,随便口胡了一下,赶紧打代码,毕竟时间不多了,最后也没打完!比赛结束五分钟后,打完代码,woc,连样例都过不去,一看,确实忽略了一些情况.这个题卡的值了! G - Isosceles Trapezium 题目中有1000个点,每个点都有一定的权值,要求你选出四个点,使得他们的权值和最大并且能够组成一个等腰梯形. 首先我们肯定是要挖掘等腰梯形的性质,来帮助我…