# include <iostream>
# include <string.h>
using namespace std;
int CaculateWeekDay(int y, int m, int d)
{
int week = -1;
if(m == 1 || m == 2)
{
m += 12;
y--;
}
week = (d+2*m+3*(m+1)/5+y+y/4-y/100+y/400+1)%7;
return week;
}
int main()
{
cout<<CaculateWeekDay(2013, 8, 4)<<endl;
return 0;
}
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