题解 | 获得月份天数

def compute(year, month):
    if month == 2:
        if year % 400 == 0 or (year % 100 != 0 and year % 4 == 0):
            return 29
        else:
            return 28
    if month == 1 or month == 3 or month == 5 or month == 7 or month == 8 or month == 10 or month == 12:
        return 31
    else:
        return 30
    
while True:
    try:
        year, month = map(int, input().split())
        print(compute(year, month))
    except:
        break