include<bits/stdc++.h> using namespace std; int main(){

int A,B; cin>>A>>B; if(A%4==0&&(A%100!=0||A%400==0)) {

if(B==1||B==3||B==5||B==7||B==8||B==10||B==12) {

cout<<"31";

} else if(B==4||B==6||B==9||B==11) {

cout<<"30";

} else {

cout<<"29";

} } else {

if(B==1||B==3||B==5||B==7||B==8||B==10||B==12) {

cout<<"31";

} else if(B==4||B==6||B==9||B==11) {

cout<<"30";

} else {

cout<<"28";

} } return 0; }