#include<iostream> 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(y%4==0&&y%100!=0||y%400==0) { cout<<29 } else { cout<<28; } return 0; }