我对编程很不熟悉,而且不可否认的是,我很不好意思分享我的代码以供评论。这段代码可以工作,并对下面的问题(https://projecteuler.net/problem=17)给出了正确的答案,但我希望我可以得到一些关于如何使它不那么难看和更精简的评论,甚至可以从一个全新的角度来处理这个问题,以便我能更好地从这个解决方案中学习非常感谢你的帮助!
# the final list that holds the string lengths
addList = []
# dictionary holding integer:corresponding word pairs
numbersDict = {
0:"zero",
1:"one",
2:"two",
3:"three",
4:"four",
5:"five",
6:"six",
7:"seven",
8:"eight",
9:"nine",
10:"ten",
11:"eleven",
12:"twelve",
13:"thirteen",
14:"fourteen",
15:"fifteen",
16:"sixteen",
17:"seventeen",
18:"eighteen",
19:"nineteen",
20:"twenty",
30:"thirty",
40:"forty",
50:"fifty",
60:"sixty",
70:"seventy",
80:"eighty",
90:"ninety"
}
### There has to be an easier way to do all this below ###
def numberLetters(num):
letters = ""
if 0 < num <= 20:
letters += numbersDict[num]
if 21 <= num <= 99:
a,b = divmod(num, 10)
if b == 0:
letters += numbersDict[a*10]
else:
letters += numbersDict[a*10] + numbersDict[b]
if 100 <= num <= 999:
if num % 100 == 0:
letters += numbersDict[int(num / 100)] + "hundred"
else:
digit = int(num / 100)
num = num - digit * 100
if 0 < num <= 20:
letters += numbersDict[digit] + "hundredand" + numbersDict[num]
if 21 <= num <= 99:
a,b = divmod(num, 10)
if b == 0:
letters += numbersDict[digit] + "hundredand" + numbersDict[a*10]
else:
letters += numbersDict[digit] + "hundredand" + numbersDict[a*10] + numbersDict[b]
if num == 1000:
letters += "onethousand"
return letters
for i in range(1,1001):
addList.append(len(numberLetters(i)))
print(sum(addList))
最佳答案
这是我的代码:
words = [
(1, 'one' ,'' ),
(2, 'two' ,'' ),
(3, 'three' ,'' ),
(4, 'four' ,'' ),
(5, 'five' ,'' ),
(6, 'six' ,'' ),
(7, 'seven' ,'' ),
(8, 'eight' ,'' ),
(9, 'nine' ,'' ),
(10, 'ten' ,'' ),
(11, 'eleven' ,'' ),
(12, 'twelve' ,'' ),
(13, 'thirteen' ,'' ),
(14, 'fourteen' ,'' ),
(15, 'fifteen' ,'' ),
(16, 'sixteen' ,'' ),
(17, 'seventeen','' ),
(18, 'eighteen' ,'' ),
(19, 'nineteen' ,'' ),
(20, 'twenty' ,'' ),
(30, 'thirty' ,'' ),
(40, 'forty' ,'' ),
(50, 'fifty' ,'' ),
(60, 'sixty' ,'' ),
(70, 'seventy' ,'' ),
(80, 'eighty' ,'' ),
(90, 'ninety' ,'' ),
(100, 'hundred' ,'and'),
]
words.reverse()
def spell(n, i=0):
global words
word = ""
while n > 0:
for num in words[i:]:
if num[0] <= n:
div = n // num[0]
n = n % num[0]
if num[2]: word+=' '+spell(div,i)
word+=' '+num[1]
if num[2] and n: word+=' '+num[2]
break
return word[1:]
count = lambda s: sum(1 for i in s if i!=' ')
print(sum(count(spell(n)) for n in range(1001)))
注意,我使用递归函数,并且添加了临时参数'I'来拼写,它记录单词中使用的最后一个索引,从而在
for num in words
循环中省去了一些迭代(实际上不是很有用,但它只需要6个字符^^)然后,我使用了一个多余的lambda函数来生成count
函数,因为函数的名称是某种注释。最后,在生成器表达式
count(spell(n)) for n in range(1001)
上使用sum函数。如果删除所有出现的
' '+
并将count替换为len,则代码可能会更短,但使用此代码,可以使用正确的spell
函数。如果你不懂黑体字,那么你应该读一本关于python 3的书。
如果您想抽出一些时间,甚至可以记住spell函数,或者创建一个您记住的count(spell())函数(因为字母计数整数比字符串轻)。