leetcode 273. Integer to English Words
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Convert a non-negative integer to its english words representation. Given input is guaranteed to be less than 231 - 1.
For example,
123 -> "One Hundred Twenty Three"12345 -> "Twelve Thousand Three Hundred Forty Five"1234567 -> "One Million Two Hundred Thirty Four Thousand Five Hundred Sixty Seven"
class Solution(object):
dic = {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'}
def numberToWords(self, num):
"""
:type num: int
:rtype: str
"""
if num == 0:
return 'Zero'
res = []
if num < 0:
res.append('Negative')
num = abs(num)
temp = num / 1000000000
num = num % 1000000000
if temp != 0:
res.append(self.dic[temp])
res.append('Billion')
temp = num / 1000000
num = num % 1000000
if temp != 0:
self.getHundred(temp, res)
res.append('Million')
temp = num / 1000
num = num % 1000
if temp != 0:
self.getHundred(temp, res)
res.append('Thousand')
if num != 0:
self.getHundred(num, res)
return ' '.join(res)
def getHundred(self, num, res):
if num / 100 != 0:
res.append(self.dic[num / 100])
res.append('Hundred')
num = num % 100
if num != 0:
if num in self.dic:
res.append(self.dic[num])
else:
res.append(self.dic[num / 10 * 10])
res.append(self.dic[num % 10])
return res
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