#include<bits/stdc++.h>
using namespace std;
const int N=1e5+5;
int y,m;
int main() {
	cin>>y>>m;
	if(m==3||m==9||m==6||m==11) cout<<30;
	else if(m==2){
		if(y%400==0||y%4==0&&y%100!=0){
    		 cout<<29; 
		}
		else cout<<28;
	} 
	else cout<<31;
    return 0;
}