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