#include<iostream> using namespace std; int main(){ long long a,b; cin>>a>>b; else if(b4||b6||b9||b11)cout<<"30"; else cout<<"31"; return 0; }

#include<iostream> using namespace std; int main(){ int a,b; cin>>a>>b; if(b2){ if(a%4000||(a%40&&a%100!=0)){ cout<<"29"; } else{ cout<<"28"; } } else if(b4||b6||b9||b==11){ cout<<"30"; } else{ cout<<"31"; } return 0; }