#include using namespace std; int main(){ int y,m; cin>>y>>m;

if(m==2){
    if(y%4==0 and y%100!=0 or y%400==0)
	cout<<29;
else
	cout<<28;
}

switch(m) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: cout<<"31"; break; case 4: case 6: case 9: case 11: cout<<"30"; break; } return 0; }