"""
输入年份和月份，输出这一年的这一月有多少天。需要考虑闰年。
"""
year, month = map(int, input().split())
if (year % 4 == 0 and year % 100 != 0) or year % 400 == 0:
if month == 1:
print(31)
elif month == 2:
print(29)
elif month == 3:
print(31)
elif month == 4:
print(30)
elif month == 5:
print(31)
elif month == 6:
print(30)
elif month == 7:
print(31)
elif month == 8:
print(31)
elif month == 9:
print(30)
elif month == 10:
print(31)
elif month == 11:
print(30)
elif month == 12:
print(31)
else:
exit()
else:
if month == 1:
print(31)
elif month == 2:
print(28)
elif month == 3:
print(31)
elif month == 4:
print(30)
elif month =
