【codeforces 761A】Dasha and Stairs
来源:互联网 发布:昊腾淘宝没有卖的吗 编辑:程序博客网 时间:2024/06/08 15:03
time limit per test2 seconds
memory limit per test256 megabytes
inputstandard input
outputstandard output
On her way to programming school tiger Dasha faced her first test — a huge staircase!
The steps were numbered from one to infinity. As we know, tigers are very fond of all striped things, it is possible that it has something to do with their color. So on some interval of her way she calculated two values — the number of steps with even and odd numbers.
You need to check whether there is an interval of steps from the l-th to the r-th (1 ≤ l ≤ r), for which values that Dasha has found are correct.
Input
In the only line you are given two integers a, b (0 ≤ a, b ≤ 100) — the number of even and odd steps, accordingly.
Output
In the only line print “YES”, if the interval of steps described above exists, and “NO” otherwise.
Examples
input
2 3
output
YES
input
3 1
output
NO
Note
In the first example one of suitable intervals is from 1 to 5. The interval contains two even steps — 2 and 4, and three odd: 1, 3 and 5.
【题目链接】:http://codeforces.com/contest/761/problem/A
【题解】
一段区间里面,偶数和奇数的个数的差的绝对值不会超过1;
但是有个Hack点0 0;
一段区间里面不可能既没有奇数也没有偶数;
【完整代码】
#include <bits/stdc++.h>using namespace std;int a,b;int main(){ cin >> a >> b; int temp = abs(a-b); if (temp<=1) { if (a==0 && b==0) puts("NO"); else puts("YES"); } else puts("NO"); return 0;}
- 【codeforces 761A】Dasha and Stairs
- Codeforces 761A-Dasha and Stairs
- CodeForces 761A Dasha and Stairs【水题】
- CodeForces-761A-Dasha and Stairs [水题]
- codeforces 761A Dasha and Stairs
- codeforces 753 A. Dasha and Stairs
- Codeforces-Round 394#A-Dasha and Stairs
- A. Dasha and Stairs
- poj 761A Dasha and Stairs
- Codeforcrs 761 A Dasha and Stairs
- Codeforces Round #394(Div. 2)A.Dasha and Stairs【水题】
- Codeforces Round #394 (Div. 2) A. Dasha and Stairs 易错
- Codeforces Round #394 (Div. 2)(A. Dasha and Stairs,B. Dasha and friends,C. Dasha and Password)
- CF761 A. Dasha and Stairs (水题)
- Codeforces761A. Dasha and Stairs
- Codeforces761A Dasha and Stairs
- Dasha and Stairs
- Dasha and Stairs
- 卡片式控件CardView&源码分析
- 405. Convert a Number to Hexadecimal
- wellbet意甲虚假广告宣传。号称赞助意甲
- Erlang, delta replica system
- 关于位操作的总结
- 【codeforces 761A】Dasha and Stairs
- 【codeforces 761B】Dasha and friends
- Labview2016安装及破解步骤
- JDBC——java中数据库的应用
- Java——ConcurrentMap 解读
- mysql 5.7.13 安装配置方法图文教程(linux)
- 【codeforces 761C】Dasha and Password(动态规划做法)
- Gzip压缩
- 瑞安led发光字制作