// https://codeforces.com/contest/698/submission/152735692

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define mp make_pair
#define si(x) int(x.size())
const int mod=1000000007,MAX=105,INF=1<<30;

vector<int> monlen={31,28,31,30,31,30,31,31,30,31,30,31};

ll f(ll y,ll tuki,ll dd,ll youbi,ll hh,ll mm,ll ss){
    ll res=0;
    for(ll i=1970;i<y;i++){
        if((i%400==0)||(i%100!=0&&i%4==0)){
            res+=366*24*60*60;
        }else{
            res+=365*24*60*60;
        }
    }
    
    for(int i=0;i<tuki;i++){
        ll z=monlen[i];
        if((y%400==0)||(y%100!=0&&y%4==0)){
            if(i==1) z++;
        }
        res+=z*24*60*60;
    }
    
    res+=dd*24*60*60;
    
    res+=hh*60*60;
    
    res+=mm*60;
    
    res+=ss;
    
    return res;
}

void upd(ll &y,ll &tuki,ll &dd,ll &youbi,ll &hh,ll &mm,ll &ss){
    mm+=ss/60;
    ss%=60;
    hh+=mm/60;
    mm%=60;
    ll x=hh/24;
    youbi=(youbi+x)%7;
    dd+=x;
    hh%=24;
    for(ll i=tuki;;i++){
        ll z=monlen[i%12];
        if((y%400==0)||(y%100!=0&&y%4==0)){
            if(i%12==1) z++;
        }
        if(dd>=z){
            dd-=z;
            tuki++;
            if(tuki==12){
                y++;
                tuki=0;
            }
        }else{
            break;
        }
    }
}

ll s,m,h,day,date,month;

bool check(ll &y,ll &tuki,ll &dd,ll &youbi,ll &hh,ll &mm,ll &ss){
    upd(y,tuki,dd,youbi,hh,mm,ss);
    
    if(month!=-1){
        if(month!=tuki) return false;
    }
    if(h!=-1){
        if(hh!=h) return false;
    }
    if(m!=-1){
        if(mm!=m) return false;
    }
    if(s!=-1){
        if(ss!=s) return false;
    }
    if(date==-1&&day==-1){
        
    }else if(date==-1){
        if(day!=youbi) return false;
    }else if(day==-1){
        if(date!=dd) return false;
    }else{
        if((date!=dd)&&(day!=youbi)) return false;
    }
    
    return true;
}

int main(){
    
    std::ifstream in("text.txt");
    std::cin.rdbuf(in.rdbuf());
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    ll y=1969,tuki=0,dd=0,youbi=2,hh=0,mm=0,ss=0;
    ll Y;cin>>Y;
    ll ans=0;
    vector<int> S(12,-1);
    while(y<=Y){
        if(y==Y){
            if(S[tuki]==-1){
                ans++;
                S[tuki]=0;
            }else{
                if(youbi==0) ans++;
            }
        }
        ss+=86400;
        upd(y,tuki,dd,youbi,hh,mm,ss);
    }
    
    cout<<ans<<endl;
    
}