#include <iostream>
using namespace std;
int months1[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int months2[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};
int main(){
    int ans = 2;
    int xq = 5;//星期
    for(int i=2000; i<=2020; i++){//year
        if(i%4==0 && i%100!=0 || i%400==0){//闰年
            for(int j=1; j<=12; j++){//month
                for(int k=1; k<=months2[j]; k++){//day
                    if(xq == 1 || k==1) ans += 2;
                    else ans += 1;
                    xq = (xq + 1) % 7;
                    if(i == 2020 && j == 10 && k == 1) cout<<ans<<endl;
                }
            }
        }else{//平年
            for(int j=1; j<=12; j++){//month
                for(int k=1; k<=months1[j]; k++){//day
                    if(xq == 1 || k==1) ans += 2;
                    else ans += 1;
                    xq = (xq + 1) % 7; 
                }
            }
        }
    }
    return 0;
}