lew (06/09/82)
According to the following program, and the knowledge that 12/25/2000
is a Monday, the occurences of Christmas on Monday through Sunday are
56 58 57 57 58 56 58
Computation is much easier than thinking!
main(){
int year,day,weekday[7],i;
for( i=0 ; i<7 ; i++ ) weekday[i]=0;
for( day=0 , year=1 ; year <= 400 ; year++ ){
++day;
if( year%4 == 0 && (year%100 != 0 || year == 400 )) ++day;
++weekday[day%7];
}
for( i=0 ; i<7 ; i++ ) printf(" %d",weekday[i]);
printf("\n");
}