#include<iostream>
using namespace std;
int main(){
	int a,b;
	cin>>a>>b;
	if(b==1){
		cout<<"31";
	}else if(b==2){
		if(a%4==0||a%400==0){
			cout<<"29";
		}else{
			cout<<"28";
		}
	}else if(b==3){
		cout<<"31";
	}else if(b==4){
		cout<<"30";
	}else if(b==5){
		cout<<"31";
	}else if(b==6){
		cout<<"30";
	}else if(b==7){
		cout<<"31";
	}else if(b==8){
		cout<<"31";
	}else if(b==9){
		cout<<"30";
	}else if(b==10){
		cout<<"31";
	}else if(b==11){
		cout<<"30";
	}else if(b==12){
		cout<<"31";
	}
	return 0;
}