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Contains Duplicate

EasyArrays & Hashing

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Overall Progress0 / 75 Solved (0%)

Category Mastery

Arrays & Hashing0/8

Two Pointers0/3

Sliding Window0/4

Stack0/1

Binary Search0/2

Linked List0/6

Trees0/11

Tries0/3

Heap / Priority Queue0/1

Backtracking0/2

Graphs0/6

Advanced Graphs0/1

1-D Dynamic Programming0/10

2-D Dynamic Programming0/2

Greedy0/2

Intervals0/5

Math & Geometry0/3

Bit Manipulation0/5

Syllabus Table(75 problems)

#	Title	Category	Difficulty	Status	Action
1	Contains Duplicate	Arrays & Hashing	Easy	Unstarted	Open
2	Valid Anagram	Arrays & Hashing	Easy	Unstarted	Open
3	Two Sum	Arrays & Hashing	Easy	Unstarted	Open
4	Group Anagrams	Arrays & Hashing	Medium	Unstarted	Open
5	Top K Frequent Elements	Arrays & Hashing	Medium	Unstarted	Open
6	Encode and Decode Strings	Arrays & Hashing	Medium	Unstarted	Open
7	Product of Array Except Self	Arrays & Hashing	Medium	Unstarted	Open
8	Longest Consecutive Sequence	Arrays & Hashing	Medium	Unstarted	Open
9	Valid Palindrome	Two Pointers	Easy	Unstarted	Open
10	3Sum	Two Pointers	Medium	Unstarted	Open
11	Container With Most Water	Two Pointers	Medium	Unstarted	Open
12	Best Time to Buy And Sell Stock	Sliding Window	Easy	Unstarted	Open
13	Longest Substring Without Repeating Characters	Sliding Window	Medium	Unstarted	Open
14	Longest Repeating Character Replacement	Sliding Window	Medium	Unstarted	Open
15	Minimum Window Substring	Sliding Window	Hard	Unstarted	Open
16	Valid Parentheses	Stack	Easy	Unstarted	Open
17	Find Minimum In Rotated Sorted Array	Binary Search	Medium	Unstarted	Open
18	Search In Rotated Sorted Array	Binary Search	Medium	Unstarted	Open
19	Reverse Linked List	Linked List	Easy	Unstarted	Open
20	Merge Two Sorted Lists	Linked List	Easy	Unstarted	Open
21	Linked List Cycle	Linked List	Easy	Unstarted	Open
22	Reorder List	Linked List	Medium	Unstarted	Open
23	Remove Nth Node From End of List	Linked List	Medium	Unstarted	Open
24	Merge K Sorted Lists	Linked List	Hard	Unstarted	Open
25	Invert Binary Tree	Trees	Easy	Unstarted	Open
26	Maximum Depth of Binary Tree	Trees	Easy	Unstarted	Open
27	Same Tree	Trees	Easy	Unstarted	Open
28	Subtree of Another Tree	Trees	Easy	Unstarted	Open
29	Lowest Common Ancestor of a Binary Search Tree	Trees	Medium	Unstarted	Open
30	Binary Tree Level Order Traversal	Trees	Medium	Unstarted	Open
31	Validate Binary Search Tree	Trees	Medium	Unstarted	Open
32	Kth Smallest Element In a Bst	Trees	Medium	Unstarted	Open
33	Construct Binary Tree From Preorder And Inorder Traversal	Trees	Medium	Unstarted	Open
34	Binary Tree Maximum Path Sum	Trees	Hard	Unstarted	Open
35	Serialize And Deserialize Binary Tree	Trees	Hard	Unstarted	Open
36	Find Median From Data Stream	Heap / Priority Queue	Hard	Unstarted	Open
37	Combination Sum	Backtracking	Medium	Unstarted	Open
38	Word Search	Backtracking	Medium	Unstarted	Open
39	Implement Trie Prefix Tree	Tries	Medium	Unstarted	Open
40	Design Add And Search Words Data Structure	Tries	Medium	Unstarted	Open
41	Word Search II	Tries	Hard	Unstarted	Open
42	Number of Islands	Graphs	Medium	Unstarted	Open
43	Clone Graph	Graphs	Medium	Unstarted	Open
44	Pacific Atlantic Water Flow	Graphs	Medium	Unstarted	Open
45	Course Schedule	Graphs	Medium	Unstarted	Open
46	Graph Valid Tree	Graphs	Medium	Unstarted	Open
47	Number of Connected Components In An Undirected Graph	Graphs	Medium	Unstarted	Open
48	Alien Dictionary	Advanced Graphs	Hard	Unstarted	Open
49	Climbing Stairs	1-D Dynamic Programming	Easy	Unstarted	Open
50	House Robber	1-D Dynamic Programming	Medium	Unstarted	Open
51	House Robber II	1-D Dynamic Programming	Medium	Unstarted	Open
52	Longest Palindromic Substring	1-D Dynamic Programming	Medium	Unstarted	Open
53	Palindromic Substrings	1-D Dynamic Programming	Medium	Unstarted	Open
54	Decode Ways	1-D Dynamic Programming	Medium	Unstarted	Open
55	Coin Change	1-D Dynamic Programming	Medium	Unstarted	Open
56	Maximum Product Subarray	1-D Dynamic Programming	Medium	Unstarted	Open
57	Word Break	1-D Dynamic Programming	Medium	Unstarted	Open
58	Longest Increasing Subsequence	1-D Dynamic Programming	Medium	Unstarted	Open
59	Unique Paths	2-D Dynamic Programming	Medium	Unstarted	Open
60	Longest Common Subsequence	2-D Dynamic Programming	Medium	Unstarted	Open
61	Maximum Subarray	Greedy	Medium	Unstarted	Open
62	Jump Game	Greedy	Medium	Unstarted	Open
63	Insert Interval	Intervals	Medium	Unstarted	Open
64	Merge Intervals	Intervals	Medium	Unstarted	Open
65	Non Overlapping Intervals	Intervals	Medium	Unstarted	Open
66	Meeting Rooms	Intervals	Easy	Unstarted	Open
67	Meeting Rooms II	Intervals	Medium	Unstarted	Open
68	Rotate Image	Math & Geometry	Medium	Unstarted	Open
69	Spiral Matrix	Math & Geometry	Medium	Unstarted	Open
70	Set Matrix Zeroes	Math & Geometry	Medium	Unstarted	Open
71	Number of 1 Bits	Bit Manipulation	Easy	Unstarted	Open
72	Counting Bits	Bit Manipulation	Easy	Unstarted	Open
73	Reverse Bits	Bit Manipulation	Easy	Unstarted	Open
74	Missing Number	Bit Manipulation	Easy	Unstarted	Open
75	Sum of Two Integers	Bit Manipulation	Medium	Unstarted	Open