Hdu 1029 Ignatius and the Princess IV, hduignatius

Hdu 1029 Ignatius and the Princess IV, hduignatius
Ignatius and the Princess IVTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32767 K (Java/Others)
Total Submission (s): 18626 Accepted Submission (s): 7532


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?
 
InputThe 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.
 
OutputFor each test case, you have to output only one line which contains the special number you have found.
 
Sample Input

51 3 2 3 3111 1 1 1 1 5 5 5 5 5 571 1 1 1 1 1 1

 
Sample Output

351 simple question: use hash to provide two AC codes:
#include <stdio.h>#include <string.h>#define MAX 5000010int dp[MAX] ;int main(){int n ;while(scanf("%d",&n)!=EOF){int index = 0 ;memset(dp,0,sizeof(dp)) ;for(int i = 0 ; i < n ; ++i){int t;scanf("%d",&t) ;dp[t]++ ;if(dp[t]>=(n+1)/2) index = t;}printf("%d\n",index) ;}return 0 ;}

#include <stdio.h>#include <string.h>#define MAX 5000010#define INF -222222222int dp[MAX] ;int main(){int n ;while(scanf("%d",&n)!=EOF){int ans = INF ,index = 0 ;memset(dp,0,sizeof(dp)) ;for(int i = 0 ; i < n ; ++i){int t;scanf("%d",&t) ;dp[t]++ ;if(dp[t]>=ans){index = t;ans = dp[t] ;}}printf("%d\n",index) ;}return 0 ;}

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