题解 | #计算日期到天数转换#

如果是整百年，需要被400整除才是闰年，不是整百年被4整除就是闰年

a = input()
b, c, d = map(int,a.split(' '))

def m(b,c,d):
    if c == 1:
        print(d)
    elif c == 2:
        print(d+31)
    elif c == 3:
        print(d + 31 + 29)
    elif c == 4:
        print(d+31+29+31)
    elif c == 5:
        print(d + 31 + 29 + 31 + 30)
    elif c == 6:
        print(d + 31 + 29 + 31 + 30 + 31)
    elif c == 7:
        print(d + 31 + 29 + 31 + 30 + 31 + 30)
    elif c == 8:
        print(d + 31 + 29 + 31 + 30 + 31 + 30 + 31)
    elif c == 9:
        print(d + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31)
    elif c == 10:
        print(d + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30)
    elif c == 11:
        print(d + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31)
    elif c == 12:
        print(d + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 +30)
def n(b,c,d):
    if c == 1:
        print(d)
    elif c == 2:
        print(d+31)
    elif c == 3:
        print(d + 31 + 28)
    elif c == 4:
        print(d+31+28+31)
    elif c == 5:
        print(d + 31 + 28 + 31 + 30)
    elif c == 6:
        print(d + 31 + 28 + 31 + 30 + 31)
    elif c == 7:
        print(d + 31 + 28 + 31 + 30 + 31 + 30)
    elif c == 8:
        print(d + 31 + 28 + 31 + 30 + 31 + 30 + 31)
    elif c == 9:
        print(d + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31)
    elif c == 10:
        print(d + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30)
    elif c == 11:
        print(d + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31)
    elif c == 12:
        print(d + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 +30)
if b %100 ==0 and b%400 == 0:
    m(b, c, d)
elif b%100 != 0 and b%4==0:
    m(b,c,d)
else:
    n(b,c,d)