A water problem Time Limit: 5000/2500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 173    Accepted Submission(s): 92

Problem Description
Two planets named Haha and Xixi in the universe and they were created with the universe beginning.

There is 73 days in Xixi a year and 137 days in Haha a year.

Now you know the days N after Big Bang, you need to answer whether it is the first day in a year about the two planets.
 

Input
There are several test cases(about 5 huge test cases).

For each test, we have a line with an only integer N(0≤N) , the length of N is up to 10000000 .
 

Output
For the i-th test case, output Case #i: , then output "YES" or "NO" for the answer.
 

Sample Input
10001 0 333
 

Sample Output
Case #1: YES Case #2: YES Case #3: NO
 

本题题意：求N对10001取模是否为零。
题解：一般的取模方法会超时，因为输入的大整数的长度为10000000，这里必须用特殊的分段取模方法
代码如下： 
#include<string.h>
#include<stdio.h>
#include<stdlib.h> 
#include<stack>
#include<math.h>
#include<queue>
#include<algorithm>
using namespace std; 
#define mods 10001 
#define maxn 10000005
int a[maxn];
char s[maxn]; 
int main()  
{   
    int l,i,j,len,k,t,cases=0;  
    while(scanf("%s",s)!=EOF)  
    {  
        len=strlen(s);  
        j=0;  
        for(i=len-1; i>=0; i-=4)  
        {  
            a[j]=0;  
            for(k=i-3; k<=i; k++)  
                if(k>=0)  
                    a[j]=a[j]*10+s[k]-'0';  
            j++;  
        }  
		int mod=0;
        for(i=0; i<j; i++) 
             mod=(mod*10000+a[i])%mods;  
        if(mod)  
           printf("Case #%d: NO\n",++cases); 
        else  
           printf("Case #%d: YES\n",++cases); 
    }  
    return 0;  
}