hdu 5058 So easy

题目连接

http://acm.hdu.edu.cn/showproblem.php?pid=5058 

So easy

Description

Small W gets two files. There are n integers in each file. Small W wants to know whether these two files are same. So he invites you to write a program to check whether these two files are same. Small W thinks that two files are same when they have the same integer set.
For example file A contains (5,3,7,7),and file B contains (7,5,3,3). They have the same integer set (3,5,7), so they are same.
Another sample file C contains(2,5,2,5), and file D contains (2,5,2,3).
The integer set of C is (2,5),but the integer set of D is (2,3,5),so they are not same.
Now you are expected to write a program to compare two files with size of n.

Input

Multi test cases (about 100). Each case contain three lines. The first line contains one integer n represents the size of file. The second line contains n integers
$a_1, a_2, a_3, \ldots, a_n$ - represents the content of the first file. The third line contains n integers $b_1, b_2, b_3, \ldots, b_n$ - represents the content of the second file.
Process to the end of file.
$1 \leq n \leq 100$
$1 \leq a_i , b_i \leq 1000000000$

Output

For each case, output "YES" (without quote) if these two files are same, otherwise output "NO" (without quote).

Sample Input

3
1 1 2
1 2 2
4
5 3 7 7
7 5 3 3
4
2 5 2 3
2 5 2 5
3
1 2 3
1 2 4

Sample Output

YES

YES

NO

NO

刷些水题打发时间。。

#include<cstdio>
#include<set>
using std::set;
set<int> A, B;
int main() {
    int n, v;
    while (~scanf("%d", &n)) {
        for (int i = 0; i < n << 1; i++) {
            scanf("%d", &v);
            if (i < n) A.insert(v);
            else B.insert(v);
        }
        if (A == B) puts("YES");
        else puts("NO");
        A.clear(), B.clear();
    }
    return 0;
}