$\color{blue}{\text{Codyy}}$

#include <bits/stdc++.h>

using namespace std;

bool check(long long n) {
    return (n % 4 == 0 && n % 100 != 0) || (n % 400 == 0);
}

int main() {
    long long d, y;
    cin >> d >> y;

    switch(d) {
        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;
        case 2:
            if (check(y))
                cout << "29";
            else
                cout << "28";
            break;
   
    }
    return 0;
}