控制流-计算Y年M月的天数-闰年

y=int(input('year?'))
m=int(input('month?'))

dic={1:31,2:28,3:31,4:30,5:31,6:30}
if y%4==0 and y%100 != 0 and m==2:
    print(dic[m]+1)
else:
    print(dic[m])