#include <iostream>
using namespace  std;
int days[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
int main(){
    int y , m;
    cin >> y >> m;
    if(y % 400 == 0 || ( y %4 == 0 && y % 100 != 0 ) ){
        days[2] = 29;
    }
    cout << days[m];
}

#include <iostream>
using namespace std;
int days[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
int main(){
     int y,m;
     cin>>y>>m;
     if(y % 400 == 0 || ( y % 4 == 0 && y % 100 != 0 )){
          days[2] = 29;
     }
     cout<<days[m];
}

y,m=map(int,input().split())
match m:
    case 4|6|9|11:
        print(30)
    case 2:
        if y%4==0 and y%100!=0 or y%400==0:
            print(29)
        else:
            print(28)
    case 1|3|5|7|8|10|12:
        print(31)

#include <iostream>
using namespace  std;
int days[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
int main(){
    int y , m;
    cin >> y >> m;
    if(y % 400 == 0 || ( y %4 == 0 && y % 100 != 0 ) ){
        days[2] = 29;
    }
    cout << days[m];
}

#include <iostream>
using namespace  std;
int days[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
int main(){
    int y , m;
    cin >> y >> m;
    if(y % 400 == 0 || ( y %4 == 0 && y % 100 != 0 ) ){
        days[2] = 29;
    }
    cout << days[m];
}

#include <iostream>
using namespace  std;
int days[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
int main(){
    int y , m;
    cin >> y >> m;
    if(y % 400 == 0 || ( y %4 == 0 && y % 100 != 0 ) ){
        days[2] = 29;
    }
    cout << days[m];
}