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GeezerVison is showing github.com — algorithms/algorithms/maths/is_strobogrammatic.py at master · oldmonad/algorithms Expand file tree/ Copy pathis_strobogrammatic.pyMore file actions 31 lines (25 loc) · 731 Bytes / Copy pathis_strobogrammatic.pyFile metadata and controls31 lines (25 loc) · 731 Bytes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 """ A strobogrammatic number is a number that looks the same when rotated 180 degrees (looked at upside down). Write a function to determine if a number is strobogrammatic. The number is represented as a string. For example, the numbers "69", "88", and "818" are all strobogrammatic. """ def is_strobogrammatic(num): """ :type num: str :rtype: bool """ comb = "00 11 88 69 96" i = 0 j = len(num) - 1 while i <= j: x = comb.find(num[i]+num[j]) if x == -1: return False i += 1 j -= 1 return True def is_strobogrammatic2(num: str): """Another implementation.""" return num == num[::-1].replace('6', '#').replace('9', '6').replace('#', '9') |
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