#include <bits/stdc++.h> using namespace std; int main() { int y,m; cin>>y>>m; if(m2) { if(y%40&&y%100!=0 || y%4000) { cout<<"29"; } else { cout<<"28"; } }else if(m4||m6||m9||m==11){ cout<<"30"; }else{ cout<<"31"; } return 0; }