Contest1414/J.py

y, m = map(int, input().strip().split())
if m in [1, 3, 5, 7, 8, 10, 12]:
    print(31)
elif m in [4, 6, 9, 11]:
    print(30)
elif y % 4 == 0 and y % 100 != 0 or y % 400 == 0:
    print(29)
else:
    print(28)