#include<bits/stdc++.h> using namespace std; int main(){ int y,m; cin>>y>>m; if(m==1||m==3||m==5||m==7||m==8||m==10||m==12) cout<<31; else if(m==4||m==6||m==9||m==11) cout<<30; else if(m==2){ if(y%4==0&&y%100!=0||y%400==0) cout<<29; else cout<<28; } return 0; }