zoukankan      html  css  js  c++  java
  • Codeforces Round #353 (Div. 2) A. Infinite Sequence

    Vasya likes everything infinite. Now he is studying the properties of a sequence s, such that its first element is equal to a (s1 = a), and the difference between any two neighbouring elements is equal to c (si - si - 1 = c). In particular, Vasya wonders if his favourite integer bappears in this sequence, that is, there exists a positive integer i, such that si = b. Of course, you are the person he asks for a help.

    Input

    The first line of the input contain three integers ab and c ( - 109 ≤ a, b, c ≤ 109) — the first element of the sequence, Vasya's favorite number and the difference between any two neighbouring elements of the sequence, respectively.

    Output

    If b appears in the sequence s print "YES" (without quotes), otherwise print "NO" (without quotes).

    Examples
    input
    1 7 3
    output
    YES
    input
    10 10 0
    output
    YES
    input
    1 -4 5
    output
    NO
    input
    0 60 50
    output
    NO
    Note

    In the first sample, the sequence starts from integers 1, 4, 7, so 7 is its element.

    In the second sample, the favorite integer of Vasya is equal to the first element of the sequence.

    In the third sample all elements of the sequence are greater than Vasya's favorite integer.

    In the fourth sample, the sequence starts from 0, 50, 100, and all the following elements are greater than Vasya's favorite integer.

     都是细节问题 害的我WA了一发

    #include<iostream>
    #include<cmath>
    using namespace std;
    int main()
    {
        int a1,s,d,q=0;
        cin>>a1>>s>>d;
        if(a1==s)
        cout<<"YES"<<endl;
        else if(a1!=s&&d==0)
        {
            if(a1==s)
            cout<<"YES"<<endl;
            else
            cout<<"NO"<<endl;
        }
        else if((s-a1)/d>0&&(s-a1)%d==0)
        cout<<"YES"<<endl;
        else
        cout<<"NO"<<endl;
    } 
  • 相关阅读:
    mysql优化三
    mysql优化一
    mysql索引二
    mysql索引
    php连接sql2005
    Android studio 自动导入(全部)包 import (转)
    Android启动页面的正确打开方式 (转载)
    coursera 视频总是缓冲或者无法观看的解决办法(Windows 和 Linux 系统 环境)
    最新解决 Ubuntu16.04 和 win10 双系统时间同步问题 (设置为 UTC 时间)
    2017年12月 六级成绩 留念
  • 原文地址:https://www.cnblogs.com/wangmenghan/p/5516932.html
Copyright © 2011-2022 走看看