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DSA Problems

Practice real interview questions and track your progress

64 problems

#	Title	Topics	Acceptance	Difficulty
1	K-Pangrams	String Hashing	20.91%	Medium
2	Find Kth Rotation	Array Stack Searching Algorithm	23.16%	Easy
3	Longest Palindromic Substring	String	34.80%	Medium
4	Roman Number to Integer	String	43.21%	Easy
5	Strings Rotations	String	43.83%	Medium
6	Longest Common Prefix	Array String	44.20%	Easy
7	Boundary Traversal	Tree Traversal Binary Tree	45.21%	Hard
8	Validate BST	Tree Traversal Binary Tree	45.23%	Medium
9	Unique Permutations	String	46.50%	Medium
10	Reverse Words In A String	String	47.80%	Easy
11	Alien Dictionary	String	47.81%	Hard
12	Stepping Numbers	BFS DFS	48.44%	Medium
13	Longest Common Subsequence	Array String Dynamic Programming	50.00%	Medium
14	Length of the longest substring	String	50.00%	Medium
15	Smallest window of 0, 1 and 2	String	50.00%	Easy
16	Smallest Window of All Characters	String Dynamic Programming	50.00%	Hard
17	First Occurrence In A String	String	50.08%	Medium
18	Redundant Parenthesis	String Stack	51.49%	Hard
19	Course Schedule	Graph BFS DFS	51.77%	Medium
20	Making A Large Island	Graph BFS DFS	52.36%	Hard
21	Winner of an election	String Hashing	53.75%	Easy
22	Binary Tree Cameras	Tree Traversal Binary Tree	55.21%	Hard
23	Maximum Path Sum in Binary Tree	Tree Traversal Binary Tree	58.59%	Hard
24	Bitonic Point	Searching Algorithm	58.67%	Easy
25	Inorder Successor in BST	Tree Traversal Binary Tree	60.12%	Medium
26	Top View of Binary Tree	Tree Traversal Binary Tree	60.21%	Medium
27	Minimum Depth of Binary Tree	Tree Traversal Binary Tree	60.25%	Medium
28	Count Non-Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	60.48%	Easy
29	Remove Duplicates From A String	String Stack	61.68%	Easy
30	Find Distance Between Two Nodes	Tree Traversal Binary Tree	62.45%	Medium
31	Construct Tree from Inorder + Postorder	Tree Traversal Binary Tree	65.12%	Medium
32	Delete Node In BST	Tree Traversal Binary Tree	65.20%	Medium
33	Find Nodes at Distance K from Given Node	Tree Traversal Binary Tree	65.95%	Hard
34	Permutation of A String	String Recursion	66.00%	Medium
35	Print All Root To Leaf Paths	Tree Traversal Binary Tree	68.59%	Hard
36	Form Anagram Groups	String Hashing	69.80%	Medium
37	Construct Tree from Inorder + Preorder	Tree Traversal Binary Tree	70.00%	Medium
38	Lowest Common Ancestor in BST	Tree Traversal Binary Tree	70.50%	Medium
39	Kth Largest Element in BST	Tree Traversal Binary Tree	70.53%	Medium
40	Binary Tree Zigzag Level Order Traversal	Tree Recursion Traversal Binary Tree	71.48%	Medium
41	Maximum Root to Leaf Path Sum	Tree Traversal Binary Tree	72.15%	Medium
42	Find the String	String	72.98%	Hard
43	Diameter of Binary Tree	Tree Traversal Binary Tree	73.45%	Medium
44	All Paths With Given Sum	Tree Traversal Binary Tree	74.23%	Medium
45	Right View of Binary Tree	Tree Traversal Binary Tree	74.36%	Medium
46	Convert Sorted Array to BST	Tree Traversal Binary Tree	74.56%	Medium
47	Count Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	74.59%	Medium
48	Check if Tree is Symmetric	Tree Traversal Binary Tree	74.98%	Medium
49	Height / Max Depth of Binary Tree	Tree Traversal Binary Tree	75.36%	Medium
50	Count Total Nodes in Binary Tree	Tree Traversal Binary Tree	75.68%	Medium