Ignatius and the Princess IV

Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32767K (Java/Other)

Total Submission(s) : 5   Accepted Submission(s) : 2

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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

Author

Ignatius.L

//哈希算法；

 1 #include<stdio.h>
 2 #include<string.h>
 3 int hash[1000000];
 4 int main()
 5 {
 6     int t;
 7     while(~scanf("%d",&t))
 8     {
 9         int i,temp;
10         memset(hash,0,sizeof(hash));
11         for(i=0;i<t;i++)
12         {
13             int a;
14             scanf("%d",&a);
15             hash[a]++;
16             if(hash[a]>=(t+1)/2)
17             temp=a;
18         }
19         printf("%d\n",temp);
20     }
21     return 0;
22 }