#include<bits/stdc++.h>
using namespace std;
const int N=1e6;
int vis[N],arr[N];
void check()
{
	memset(vis,0,sizeof(vis));
	memset(arr,0,sizeof(arr));
	for(int i=1998;i<10000;i++)
	{
		if((i%4==0&&i%100!=0)||(i%100==0&&i%400==0))
			vis[i]=1;
	}
	arr[1]=4,arr[2]=5,arr[3]=6,arr[4]=7;
	for(int j=5;j<10000;)
	{
		for(int r=1;r<=7;r++)
		{
			arr[j]=r;
			j++;
		}
	}
}
int main()
{
	check();
	int n,sum=0;
	int s1[12]={31,28,31,30,31,30,31,31,30,31,30,31};
	int s2[12]={31,29,31,30,31,30,31,31,30,31,30,31};
	cin>>n;
	for(int i=1998;i<n;i++)
	{
		if(vis[i])
			sum+=366;
		else
			sum+=365;
	}
	int k=0;
	int day=13+sum;
	if(arr[day]==5)
		k++;
	if(vis[n])
	{
		for(int i=0;i<11;i++)
		{
			day+=s2[i];
			if(arr[day]==5)
				k++;
		}
	}
	else
	{
		for(int i=0;i<11;i++)
		{
			day+=s1[i];
			if(arr[day]==5)
				k++;
		}
	}
	cout<<k<<endl;
	return 0;
}