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Remove Duplicates from an Linked List

Problem Write code to remove duplicates from an unsorted linked list. FOLLOW UP How would you solve this problem if a temporary buffer is not allowed? How to Solve By using HashSet, I can control if each value appears or not already. And i…

316. Remove Duplicate Letters : Past Google Coding Interview

Problem leetcode.com How to Solve This problem is solved by the following steps. find out index that each letter appears int the last position have the indexes calculating at step 1 in a array sort the arrays created at step2 4 check the s…