#include <iostream>

using namespace std;

int res = 5 , xx;
int cnt[12] = {31 , 28 , 31 , 30 , 31 , 30 , 31 , 31 , 30 , 31 , 30 , 31};

bool is(int x) {
    if(x % 400 == 0 || (x % 4 == 0 && x % 100 != 0)) return true;
    return false;
}

int main()
{
    for(int i = 2000 ; i < 2020 ; i ++ ) {
        if(is(i)) cnt[1] = 29;
        else cnt[1] = 28;
        for(int j = 0 ; j < 12 ; j ++ ) {
            for(int k = 1 ; k <= cnt[j] ; k ++ ) {
                res ++;
                if(res % 7 == 0 || k == 1) xx ++;
            }
        }
    }
    cnt[1] = 29;
    for(int i = 0 ; i < 9 ; i ++ ) 
        for(int j = 0 ; j < cnt[i] ; j ++ ) {
            res ++;
            if(res % 7 == 0 || j == 1) xx ++;
        }
    cout << res + xx ;
    return 0;   

 }