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