qiujiu

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