#include <iostream>
using namespace std;
int main() {
// your code goes here
int n,m;
cin>>m>>n;
if(n==1||n==3||n==5||n==7||n==8||n==10||n==12) cout<<31;
else if(n==4||n==6||n==9||n==11) cout<<30;
else if(n==2&&m%4==0&&m%100!=0) cout<<29;
else cout<<28;
return 0;
}
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