72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
def single_digit_integer_to_spoken_language(n):
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if n == 0:
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return ""
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assert(n > 0 and n < 10)
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return {1: 'one', 2: 'two', 3: 'three', 4: 'four', 5: 'five',
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6: 'six', 7: 'seven', 8: 'eight', 9: 'nine'}[n]
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def double_digit_integer_to_spoken_language(n):
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assert(n > 9 and n < 100)
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try:
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return {
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10: 'ten', 11: 'eleven', 12: 'twelve', 13: 'thirteen',
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14: 'fourteen', 15: 'fifteen', 16: 'sixteen',
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17: 'seventeen', 18: 'eighteen', 19: 'nineteen'}[n]
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except KeyError:
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pass
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a, b = str(n)
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a = {2: 'twenty', 3: 'thirty', 4: 'forty', 5: 'fifty',
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6: 'sixty', 7: 'seventy', 8: 'eighty', 9: 'ninety'}[int(a)]
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b = integer_to_spoken_language(int(b))
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return a + '-' + b
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def triple_digit_integer_to_spoken_language(n):
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a, b = str(n)[0], str(n)[1:]
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a = single_digit_integer_to_spoken_language(int(a))
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b = integer_to_spoken_language(int(b))
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if not b:
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return a + " hundred"
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return a + " hundred and " + b
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def four_digit_integer_to_spoken_language(n):
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a, b = str(n)[0], str(n)[1:]
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a = single_digit_integer_to_spoken_language(int(a))
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b = integer_to_spoken_language(int(b))
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return a + " thousand " + b
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def integer_to_spoken_language(n):
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length = len(str(n))
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if length == 1:
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return single_digit_integer_to_spoken_language(n)
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elif length == 2:
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return double_digit_integer_to_spoken_language(n)
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elif length == 3:
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return triple_digit_integer_to_spoken_language(n)
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elif length == 4:
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return four_digit_integer_to_spoken_language(n)
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else:
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raise Exception("Length not supported.")
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assert(integer_to_spoken_language(5) == 'five')
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assert(integer_to_spoken_language(19) == 'nineteen')
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assert(integer_to_spoken_language(21) == 'twenty-one')
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assert(integer_to_spoken_language(210) == 'two hundred and ten')
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assert(integer_to_spoken_language(3000) == 'three thousand ')
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assert(integer_to_spoken_language(8333) ==
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'eight thousand three hundred and thirty-three')
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def euler_017():
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s = "".join([integer_to_spoken_language(i) for i in range(1, 1001)])
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s = s.replace(" ", "").replace("-", "")
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return len(s)
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assert(euler_017() == 21124)
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print("e017.py: {}".format(euler_017()))
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