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