arr = [31,28,31,30,31,30,31,31,30,31,30,31]
m = int(input("Month is "))
y = int(input("Year is "))
if m == 2 and ((y % 4 == 0 and y % 100 != 100) or y % 400 == 0):
    print("29")
else:
print(arr[m-1])