# N！Again

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 3481    Accepted Submission(s): 1889

Problem Description
WhereIsHeroFrom:             Zty, what are you doing ?
Zty:                                     I want to calculate N!......
WhereIsHeroFrom:             So easy! How big N is ?
Zty:                                    1 <=N <=1000000000000000000000000000000000000000000000…
WhereIsHeroFrom:             Oh! You must be crazy! Are you Fa Shao?
Zty:                                     No. I haven's finished my saying. I just said I want to calculate N! mod 2009

Hint : 0! = 1, N! = N*(N-1)!

Input
Each line will contain one integer N(0 <= N<=10^9). Process to end of file.

Output
For each case, output N! mod 2009

Sample Input
4
5

Sample Output
24
120

题目来源：http://acm.hdu.edu.cn/showproblem.php?pid=2674
``` 1 #include <stdio.h>
2 #include <stdlib.h>
3 int main()
4 {
5     int n;
6     int ans,i;
7     while(~scanf("%d",&n))
8     {
9         ans=1;
10         if(n>=2009)
11             printf("0
");
12         else
13         {
14             for(i=1;i<=n;i++)
15             {
16                 ans*=i;
17                 ans%=2009;
18             }
19             printf("%d
",ans);
20         }
21     }
22     return 0;
23 }```

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