#include <bits/stdc++.h>

using namespace std;

const int days[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

inline int isLeapYear(int year){
	return ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0);
}

inline int daysIn(int year, int month){
	return days[month] + (month == 2 && isLeapYear(year));
}

int f[2050];

inline void precalc(){
	int ptr = 3;
	for(int year = 1970; year <= 2037; ++year){
		for(int month = 1; month <= 12; ++month){
			int cnt = daysIn(year, month);
			++f[year];
			for(int day = 1; day <= cnt; ++day, (++ptr) %= 7){
				if(day + 1 <= cnt && ptr == 6) ++f[year];
			}
		}
	}
}

int main(){
	precalc();
	int n; scanf("%d", &n);
	printf("%d\n", f[n]);
	return 0;
}