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Still WA

Posted by betaver at 2006-10-22 12:23:44 on Problem 3047
In Reply To:重写了,还是WA Posted by:betaver at 2006-10-22 12:22:28 
//PKKU3047 Bovine Birthday
#include <stdio.h>
#include <stdlib.h>

int y,m,d,w,c,a;
char *weekday[]={"sunday","monday","tuesday","wednesday","thursday","friday","saturday"};

int main()
{
    while (scanf("%d%d%d",&y,&m,&d)!=EOF){
    a=(14-m)/12;
    y=y-a;
    m=m+12*a-2;
    c=y/100;
    y=y%100;
    w=(c/4-2*c+y+y/4+((13*m-1)/5)+d)%7;
    printf("%s\n",weekday[w]);
    }
}
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