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推廣網站開發,包含 Laravel 和 Kotlin 後端撰寫、自動化測試、讀書心得等。Taiwan Kotlin User Group 管理員。

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Hi, here's your problem today. This problem was recently asked by AirBNB:

Given a phone number, return all valid words that can be created using that phone number.

For instance, given the phone number 364 we can construct the words ['dog', 'fog'].

Here's a starting point:

lettersMaps = {
    1: [],
    2: ['a', 'b', 'c'],
    3: ['d', 'e', 'f'],
    4: ['g', 'h', 'i'],
    5: ['j', 'k', 'l'],
    6: ['m', 'n', 'o'],
    7: ['p', 'q', 'r', 's'],
    8: ['t', 'u', 'v'],
    9: ['w', 'x', 'y', 'z'],
    0: []

validWords = ['dog', 'fish', 'cat', 'fog']

def makeWords(phone):
  #Fill this in

# ['dog', 'fog']