What day is it

Description

Today is Saturday, 17th Nov,2007. Now, if i tell you a date, can you tell me what day it is ?       

              

Input

There are multiply cases.        One line is one case.        There are three integers, year(0<year<10000), month(0<=month<13), day(0<=day<32).       

              

Output

Output one line.        if the date is illegal, you should output "illegal". Or, you should output what day it is.       

        

Sample Input

2007 11 17

              

Sample Output

Saturday

 

 

注意这题细节很多，我是从0001年01月01日为周一考虑的。

 #include <iostream>
 #include <stdio.h>
 #include <cstring>
 using namespace std;
 int a[]={, , , , , , , , , , , , };
 int b[]={, , , , , , , , , , , , };
 char c[][]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
 int panduan(int y)
 {
     if((y%== && y%!=) || y%==)
         return ;
     return ;
 }
 int main()
 {
    int y, m, d, sum, i;
    while(cin>>y>>m>>d)
    {
       if(panduan(y))
       {
           if(d>b[m]||m==||d==)
             {
                 cout << "illegal" << endl;
                 continue;
             }
       }
       else
         {
             if(d>a[m]||m==||d==)
             {
                 cout << "illegal" << endl;
                 continue;
             }
         }
         sum=;
         for (i=; i<y; ++i)
             {
                if(panduan(i))
                 sum += ;
                else
                 sum += ;

             }
         for(int i = ; i < m; ++i)
         {
             if(panduan(y))
                 sum += b[i];
             else
                 sum += a[i];

         }
         sum+=d;
         sum%=;
         cout<< c[sum] << endl;
    }
    return ;
 }