【UVa】10763 – Foreign Exchange
来源:互联网 发布:ubuntu 14.04 selinux 编辑:程序博客网 时间:2024/06/05 16:39
Problem here
Problem
Your non-profit organization (iCORE – international Confederation of Revolver Enthusiasts) coordinates a very successful foreign student exchange program. Over the last few years, demand has sky-rocketed and now you need assistance with your task. The program your organization runs works as follows: All candidates are asked for their original location and the location they would like to go to. The program works out only if every student has a suitable exchange partner. In other words, if a student wants to go from A to B, there must be another student who wants to go from B to A. This was an easy task when there were only about 50 candidates, however now there are up to 500000 candidates!
INPUT
The input file contains multiple cases. Each test case will consist of a line containing n – the number of candidates (1 ≤ n ≤ 500000), followed by n lines representing the exchange information for each candidate. Each of these lines will contain 2 integers, separated by a single space, representing the candidate』s original location and the candidate』s target location respectively. Locations will be represented by nonnegative integer numbers. You may assume that no candidate will have his or her original location being the same as his or her target location as this would fall into the domestic exchange program. The input is terminated by a case where n = 0; this case should not be processed.
OUTPUT
For each test case, print 『YES』 on a single line if there is a way for the exchange program to work out, otherwise print 『NO』.
SAMPLE INPUT
4
1 3
2 4
5 7
14 8
0
SAMPLE OUTPUT
NO
Solution
將目的地和出發地存成兩個數組,再各自排序,排序後是相等的代表交換成功,否則就失敗
#include <iostream>#include <algorithm>#include <vector>using namespace std;bool pred(int i, int j){ return i==j;}int main(){ int n; while(cin >> n){ vector<int> go, come; if(n == 0){ break; } while(n--){ int g, c; cin >> c >> g; go.push_back(g); come.push_back(c); } sort(go.begin(), go.end()); sort(come.begin(), come.end()); if(equal(go.begin(), go.end(), come.begin(), pred)){ cout << "YES" << endl; }else{ cout << "NO" << endl; } } return 0;}
- 【UVa】10763 – Foreign Exchange
- UVa 10763 - Foreign Exchange
- UVa 10763 - Foreign Exchange
- uva 10763 - Foreign Exchange
- uva 10763 - Foreign Exchange
- Foreign Exchange uva 10763
- UVa 10763 - Foreign Exchange
- Uva-10763-Foreign Exchange
- UVa 10763 - Foreign Exchange
- UVa 10763 - Foreign Exchange
- UVa 10763: Foreign Exchange
- UVA 10763 Foreign Exchange
- UVa 10763 - Foreign Exchange
- uva 10763 - Foreign Exchange
- uva 10763 Foreign Exchange
- uva 10763 Foreign Exchange
- uva 10763 Foreign Exchange
- UVA 10763 Foreign Exchange
- 3.3 GreenDAO 使用心得
- 分享自己写的一个简化版LOG输出宏
- 【UVa】536 – Tree Recovery
- 二叉树三种遍历算法递归和非递归实现
- VAST Challenge 2015 Mini-Challenge 2
- 【UVa】10763 – Foreign Exchange
- C++11以前的序列点
- Java数据结构----树--红黑树
- oracle 11g归档日志研究_1
- java web文件上传功能实现
- .NET(C#)连接各类数据库-集锦
- 【UVa】1600 – Patrol Robot
- 无监督学习与维度约减 机器学习基础(7)
- Win7系统32位Oracle11g客户端安装详述