#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){
		if(a/400==0&&a/4==0&&a/100!=0&&b==2){
			cout<<29;
		} else{
			cout<<28;
		}break;
	}
    return 0;
} 	
}