#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)){
		if(month==1||month==3||month==5||month==7||month==8||month==10||month==12){
			cout<<31;
		}else if(month==2){
			cout<<29;
		}else cout<<30;
	}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;
	
	return 0;
	
}