UVA 10763 Foreign Exchange

 

CODE：

 

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cstdio>
#include <algorithm>
using namespace std;

#define MAXN 500001


int main()
{
    int n;
    while(scanf("%d", &n) && n)
    {
        for(int i = 0; i < n; i++)
        {
            scanf("%d%d", &a[i], &b[i]);
        }
        sort(a, a+n), sort(b, b+n);
        if(memcmp(a, b, sizeof(b)) == 0) printf("YES\n");
        else printf("NO\n");
    }
    return 0;
}