A - Buying Sweets 题目链接:https://abc087.contest.atcoder.jp/tasks/abc087_a Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement You went shopping to buy cakes and donuts with X yen (the currency of Japan). First, you bought one…

A - Infinite Coins 题目链接:https://abc088.contest.atcoder.jp/tasks/abc088_a Time limit : 2sec / Memory limit : 256MB Score: 100 points Problem Statement E869120 has A 1-yen coins and infinitely many 500-yen coins. Determine if he can pay exactly N yen u…

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…

Time limit : 2sec / Memory limit : 256MB Score : 400 points Problem Statement There are N people standing on the x-axis. Let the coordinate of Person i be xi. For every i, xi is an integer between 0 and 109 (inclusive). It is possible that more than…

Time limit : 2sec / Memory limit : 256MB Score : 200 points Problem Statement You have A 500-yen coins, B 100-yen coins and C 50-yen coins (yen is the currency of Japan). In how many ways can we select some of these coins so that they are X yen in to…

题意 给出n个点,m组关系L,R,D,L在R的左边距离D,判断是否存在n个人的位置满足m组关系 分析 Consider the following directed graph G: There are N vertices numbered 1,2,...,N. For each i, there are an edge from vertex Li to vertex Ri with weight Di, and an edge from vertex Ri to vertex Li wit…

A - Happy Birthday! Time limit : 2sec / Memory limit : 1000MB Score: 100 points Problem Statement E869120's and square1001's 16-th birthday is coming soon.Takahashi from AtCoder Kingdom gave them a round cake cut into 16 equal fan-shaped pieces. E869…

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…

A - Rating Goal Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement Takahashi is a user of a site that hosts programming contests.When a user competes in a contest, the rating of the user (not necessarily an integer) changes…

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,…