Amazon

Timeline

  • 12//2016 OA1

  • 12/22/2016 OA2

  • 2/24/2017 onsite

You have solved 45/ 55 problems.

# Title Acceptance Difficulty Frequency
146 LRU Cache 16.3% Hard
1 Two Sum 30.9% Easy
297 Serialize and Deserialize Binary Tree 32.1% Hard
200 Number of Islands 32.8% Medium
460 LFU Cache 20.8% Hard
438 Find All Anagrams in a String 33.3% Easy
138 Copy List with Random Pointer 26.6% Medium
20 Valid Parentheses 32.4% Easy
236 Lowest Common Ancestor of a Binary Tree 29.4% Medium
48 Rotate Image 37.4% Medium
238 Product of Array Except Self 47.5% Medium
5 Longest Palindromic Substring 24.8% Medium
121 Best Time to Buy and Sell Stock 39.6% Easy
239 Sliding Window Maximum 31.7% Hard
380 Insert Delete GetRandom O(1) 38.6% Medium
17 Letter Combinations of a Phone Number 32.9% Medium
387 First Unique Character in a String 45.7% Easy
206 Reverse Linked List 43.9% Easy
235 Lowest Common Ancestor of a Binary Search Tree 38.3% Easy
240 Search a 2D Matrix II 38.0% Medium
127 Word Ladder 19.2% Medium
42 Trapping Rain Water 35.6% Hard
155 Min Stack 26.8% Easy
49 Group Anagrams 32.4% Medium
160 Intersection of Two Linked Lists 30.1% Easy
141 Linked List Cycle 35.7% Easy
2 Add Two Numbers 26.6% Medium
242 Valid Anagram 45.2% Easy
215 Kth Largest Element in an Array 37.9% Medium
139 Word Break 28.6% Medium
234 Palindrome Linked List 31.8% Easy
126 Word Ladder II 13.7% Hard
98 Validate Binary Search Tree 22.5% Medium
23 Merge k Sorted Lists 26.2% Hard
3 Longest Substring Without Repeating Characters 23.8% Medium
449 Serialize and Deserialize BST 41.4% Medium
167 Two Sum II - Input array is sorted 48.0% Easy
21 Merge Two Sorted Lists 38.2% Easy
15 3Sum 21.1% Medium
186 Reverse Words in a String II 28.1% Medium
78 Subsets 37.4% Medium
102 Binary Tree Level Order Traversal 37.5% Medium
414 Third Maximum Number 26.9% Easy
73 Set Matrix Zeroes 35.3% Medium
89 Gray Code 39.7% Medium
8 String to Integer (atoi) 13.9% Medium
355 Design Twitter 24.9% Medium
204 Count Primes 26.2% Easy
199 Binary Tree Right Side View 39.1% Medium
119 Pascal's Triangle II 35.4% Easy
516 Longest Palindromic Subsequence 41.0% Medium
459 Repeated Substring Pattern 38.7% Easy
396 Rotate Function 30.7% Medium
508 Most Frequent Subtree Sum 51.7% Medium
451 Sort Characters By Frequency 50.0% Medium

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