#include <bits/stdc++.h> using namespace std;

int main() { int n, y, r; cin >> n >> y; if ((n % 4 == 0 && n % 100 != 0) || n % 400 == 0) { if (y == 2) { r = 29; } else if (y == 1 || y == 3 || y == 5 || y == 7 || y == 8 || y == 10 || y == 12) { r = 31; } else { r = 30; } }

else if (y == 2) {
	r = 28;

} else if (y == 1 || y == 3 || y == 5 || y == 7 || y == 8 || y == 10 || y == 12) {
	r = 31;

} else {
	r = 30;
}
cout << r;

return 0;

}