#24Medium#14 in Uber's list· asked at 14 companies
Alien Dictionary
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What we know
Example 1
Input: words = ["wrt","wrf","er","ett","rftt"] Output: "wertf"
Example 2
Input: words = ["z","x"] Output: "zx"
Example 3
Input: words = ["z","x","z"] Output: ""
The order is invalid.
Constraints
- •
1 <= words.length <= 100 - •
1 <= words[i].length <= 100 - •
words[i]consists of only lowercase English letters.