#include<stdio.h>
int main()
{
	int y, m, a;
	scanf("%d %d", &y, &m);
	if (m == 1 || 3 || 5 || 7 || 8 || 10 || 12)
		a = 31;
	if (m == 4 || 6 || 9 || 11)
		a = 30;
	if (m = 2)
		a = 28;
	 if (m=2&&(y % 4 == 0 && y % 100 != 0 || y % 400 == 0))
		a = 29;
	printf("%d", a); 
	return 0;
}