BC74 获得月份天数 思路: step1:输入year、month;创建月份对应天数的字典; step2:判断是否是闰年;判断是否修改天数,并打印天数; 代码如下: while True: try: y,m = list(map(int,input().split())) month = [0,31,28,31,30,31,30,31,31,30,31,30,31] if y%400 == 0 or (y%100 != 0 and y%4 == 0): month[2] = 29 print(month[m]) except: break