Hard

Quiz

#273 Integer to English Words

APPROACH

Convert a non-negative integer num to its English words representation.

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?