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DSA Problems

Practice real interview questions and track your progress

227 problems

#	Title	Topics	Acceptance	Difficulty
1	Remove Duplicates From A String	String Stack	61.68%	Easy
2	Remove Consecutive Duplicates	Recursion	60.00%	Easy
3	Find Element in a Sorted Array	Binary Search	80.00%	Easy
4	Binary Tree Cameras	Tree Traversal Binary Tree	55.21%	Hard
5	Boundary Traversal	Tree Traversal Binary Tree	45.21%	Hard
6	Compare Leaf Traversal	Tree Traversal Binary Tree	77.95%	Medium
7	Binary Tree Post Order Traversal	Tree Recursion Traversal Binary Tree	79.59%	Easy
8	Inorder Successor in BST	Tree Traversal Binary Tree	60.12%	Medium
9	Kth Largest Element in BST	Tree Traversal Binary Tree	70.53%	Medium
10	Construct Tree from Inorder + Postorder	Tree Traversal Binary Tree	65.12%	Medium
11	Top View of Binary Tree	Tree Traversal Binary Tree	60.21%	Medium
12	Convert Sorted Array to BST	Tree Traversal Binary Tree	74.56%	Medium
13	Find Maximum in BST	Tree Traversal Binary Tree	85.54%	Easy
14	Find Minimum in BST	Tree Traversal Binary Tree	85.18%	Easy
15	Find Distance Between Two Nodes	Tree Traversal Binary Tree	62.45%	Medium
16	All Paths With Given Sum	Tree Traversal Binary Tree	74.23%	Medium
17	Maximum Root to Leaf Path Sum	Tree Traversal Binary Tree	72.15%	Medium
18	Count Non-Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	60.48%	Easy
19	Minimum Depth of Binary Tree	Tree Traversal Binary Tree	60.25%	Medium
20	Construct Tree from Inorder + Preorder	Tree Traversal Binary Tree	70.00%	Medium
21	Right View of Binary Tree	Tree Traversal Binary Tree	74.36%	Medium
22	Lowest Common Ancestor in BST	Tree Traversal Binary Tree	70.50%	Medium
23	Kth Smallest Element in BST	Tree Traversal Binary Tree	76.77%	Medium
24	Maximum Path Sum in Binary Tree	Tree Traversal Binary Tree	58.59%	Hard
25	Delete Node In BST	Tree Traversal Binary Tree	65.20%	Medium
26	Validate BST	Tree Traversal Binary Tree	45.23%	Medium
27	Search / Insert into BST	Tree Traversal Binary Tree	89.54%	Easy
28	Find Nodes at Distance K from Given Node	Tree Traversal Binary Tree	65.95%	Hard
29	Lowest Common Ancestor of Binary Tree	Tree Traversal Binary Tree	78.59%	Medium
30	Print All Root To Leaf Paths	Tree Traversal Binary Tree	68.59%	Hard
31	Root To Leaf Path Sum	Tree Traversal Binary Tree	78.56%	Medium
32	Diameter of Binary Tree	Tree Traversal Binary Tree	73.45%	Medium
33	Check Binary Tree Is Balanced	Tree Traversal Binary Tree	78.95%	Medium
34	Check if Tree is Symmetric	Tree Traversal Binary Tree	74.98%	Medium
35	Check if Two Trees are Identical	Tree Traversal Binary Tree	76.59%	Medium
36	Count Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	74.59%	Medium
37	Count Total Nodes in Binary Tree	Tree Traversal Binary Tree	75.68%	Medium
38	Height / Max Depth of Binary Tree	Tree Traversal Binary Tree	75.36%	Medium
39	Binary Tree Zigzag Level Order Traversal	Tree Recursion Traversal Binary Tree	71.48%	Medium
40	Binary Tree Level Order Traversal	Tree Recursion Traversal Binary Tree	79.68%	Easy
41	Binary Tree Inorder Traversal	Recursion Trees Traversal Binary Tree	75.68%	Easy
42	Binary Tree Preorder Traversal	Tree Recursion Binary Tree	79.85%	Easy
43	Intersection of Two Linked Lists	Linked List	75.00%	Medium
44	Sort A Linked List (Merge Sort)	Linked List	58.00%	Medium
45	Merge K Sorted Lists	Linked List	70.00%	Medium
46	Merge Two Sorted Linked Lists	Link List	59.00%	Medium
47	Swap Nodes in Pairs	Linked List	65.00%	Medium
48	Reverse Sublist (Between Left & Right)	Linked List	67.00%	Medium
49	Reverse Linked List in K Groups	Linked List	60.00%	Medium
50	Reverse Linked List in Pairs	Linked List	63.00%	Medium