Fixed small issue

[ShashankZobb]

• File(s) Modified: 0001-two-sum.py, 0002-add-two-numbers.py, etc...
• Language(s) Used: python, javascript, etc...
• Submission URL: https://leetcode.com/problems/[problem-name]/submissions/xxxxxxxxx/ Issue fixed : code reuse #2507

File Modified : 0128-longest-consecutive-sequence.py Language Used : python Submission URL : https://leetcode.com/problems/longest-consecutive-sequence/submissions/959031000/

Issue fixed : 0128-longest-consecutive-sequence.py

File Modified : 0021-merge-two-sorted-lists.cpp Language Used : Cpp Submission URL : https://leetcode.com/problems/merge-two-sorted-lists/submissions/959034432/

Important

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