#include<bits/stdc++.h>
using namespace std;
int main(){
    int y, m;
    cin >> y >> m;
    int day;
    if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12){
        day = 31;
    }
    else if (m == 4 || m == 6 || m == 9 || m == 11){
        day = 30;
    }else{
        if ((y % 4 == 0 && y % 100 != 0) || (y % 400 == 0)){
            day = 29;
        }else{
            day = 28;
        }
    }
    cout << day << endl;
    return 0;
}