#include <bits/stdc++.h> 
using namespace std;
int main() {
	int a,b;
	cin>>a>>b;
	switch(b){
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
			cout<<"31";
			break;
		case 4:
		case 6:
		case 9:
		case 11:
			cout<<"30";
			break;
	switch(a){
		case 2:
		if((a%400==0)||(a%100!=0&&a%4==0)){
			cout<<"29";
		}else{
			cout<<"28";
		}
	} 
	}
	
	return 0;
}