#include<bits/stdc++.h> using namespace std; int main() { int a,c; cin>>a>>c; if(c1 or c3 or c5 or c7 or c8 or c10 or c12) { cout<<"31"; } else if(c2) { if(a%40 and a%100!=0 or a%4000) { cout<<"29"; } else { cout<<"28"; } } else cout<<"30"; return 0; }