#include<bits/stdc++.h>
using namespace std;
int main(){
	int y,m;
	cin>>y>>m;
	if(y%4==0&&y%100!=0||y%400==0){
		if(m==2){
			cout<<29;
		}
		else{
			cout<<28;
		} 
	}
	if(m==1||m==3||m==5||m==7||m==8||m==10||m==12){
		cout<<31;
	}
	else if(m!=2){
		cout<<30;
	}
	return 0;
}