#include <bits/stdc++.h>
using namespace std;
int A,B;
int main(){
    cin>>A>>B;
    if (A%100!=0&&(A%4==0||A%400==0)){
        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;
            case 2:cout<<29;break;
        }
    }
    else{
        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;
            case 2:cout<<28;break;
        }
    }
    return 0;
}