#include<bits/stdc++.h>
using namespace std;
int week=6,sum;
int main(){
	for(register int year=2000;year<=2020;year++){
		int	a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
		if((year%4==0&&year%100!=0)||year%400==0)a[2]=29;//闰年特判
		for(register int month=1;month<=12;month++)
			for(register int day=1;day<=a[month];day++){
				if(day==1||week==1)sum+=2;//月初或者周一
				else sum++;
				week=(week+1)%7;//星期数增加
				if(year==2020 && month==10 && day==1){
					cout<<sum;
					return 0;
				}
			}
	}
}