Hard
Quiz
#273 Integer to English Words
APPROACH
Convert a non-negative integer num into its English word representation and return the result as a string.
Example 1:
Input: num = 123
Output: "One Hundred Twenty Three"
Example 2:
Input: num = 12345
Output: "Twelve Thousand Three Hundred Forty Five"
Example 3:
Input: num = 1234567
Output: "One Million Two Hundred Thirty Four Thousand Five Hundred Sixty Seven"
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What is the optimal approach for this problem?