To be done List

https://leetcode.com/contest/weekly-contest-143/problems/path-in-zigzag-labelled-binary-tree/

https://leetcode.com/contest/weekly-contest-143/problems/filling-bookcase-shelves/

https://leetcode.com/contest/weekly-contest-143/problems/filling-bookcase-shelves/

https://leetcode.com/contest/weekly-contest-143/problems/distribute-candies-to-people/

https://leetcode.com/contest/weekly-contest-143

https://leetcode.com/contest/weekly-contest-142

https://leetcode.com/contest/weekly-contest-138