Update 0269-alien-dictionary.cpp

[rez-n0v]

• File(s) Modified: cpp/0269-alien-dictionary.cpp
• Language(s) Used: C++
• Submission URL: https://leetcode.com/problems/alien-dictionary/submissions/1350036596/

Important

Please make sure the file name is lowercase and a duplicate file does not already exist before merging.

[rez-n0v]

Cleaner than the current solution, analogous to the solution mentioned in the video.