Ignatius and the Princess IV

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32767 K (Java/Others)
Total Submission(s): 34530    Accepted Submission(s): 15051

Problem Description

"OK, you are not too bad, em... But you can never pass the next test." feng5166 says.

"I
will tell you an odd number N, and then N integers. There will be a
special integer among them, you have to tell me which integer is the
special one after I tell you all the integers." feng5166 says.

"But what is the characteristic of the special integer?" Ignatius asks.

"The
integer will appear at least (N+1)/2 times. If you can‘t find the right
integer, I will kill the Princess, and you will be my dinner, too.
Hahahaha....." feng5166 says.

Can you find the special integer for Ignatius?

Input

The
input contains several test cases. Each test case contains two lines.
The first line consists of an odd integer N(1<=N<=999999) which
indicate the number of the integers feng5166 will tell our hero. The
second line contains the N integers. The input is terminated by the end
of file.

Output

For each test case, you have to output only one line which contains the special number you have found.

Sample Input

5
1 3 2 3 3
11
1 1 1 1 1 5 5 5 5 5 5
7
1 1 1 1 1 1 1

Sample Output

3
5
1

#include <cstdio>
#include <algorithm>
using namespace std;
int a[1000001];

int main()
{
    int n;
    while(~scanf("%d",&n)) //!!!不加会超时
        {                  // ~  !=EOF
            for(int i=0;i<n;i++)
                scanf("%d",&a[i]);
            sort(a+1,a+n+1);
            printf("%d\n",a[(n+1)/2]);  //巧妙之处
        }
    return 0;
}