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DSA Problems

Practice real interview questions and track your progress

228 problems

#	Title	Topics	Acceptance	Difficulty
1	Count Connected Components	Graph	72.85%	Easy
2	Flood Fill	Recursion	69.00%	Medium
3	Number of Islands	Recursion	66.00%	Medium
4	Remove Duplicates From A String	String Stack	61.68%	Easy
5	Remove Consecutive Duplicates	Recursion	60.00%	Easy
6	Find Element in a Sorted Array	Binary Search	80.00%	Easy
7	Binary Tree Cameras	Tree Traversal Binary Tree	55.21%	Hard
8	Boundary Traversal	Tree Traversal Binary Tree	45.21%	Hard
9	Compare Leaf Traversal	Tree Traversal Binary Tree	77.95%	Medium
10	Binary Tree Post Order Traversal	Tree Recursion Traversal Binary Tree	79.59%	Easy
11	Inorder Successor in BST	Tree Traversal Binary Tree	60.12%	Medium
12	Kth Largest Element in BST	Tree Traversal Binary Tree	70.53%	Medium
13	Construct Tree from Inorder + Postorder	Tree Traversal Binary Tree	65.12%	Medium
14	Top View of Binary Tree	Tree Traversal Binary Tree	60.21%	Medium
15	Convert Sorted Array to BST	Tree Traversal Binary Tree	74.56%	Medium
16	Find Maximum in BST	Tree Traversal Binary Tree	85.54%	Easy
17	Find Minimum in BST	Tree Traversal Binary Tree	85.18%	Easy
18	Find Distance Between Two Nodes	Tree Traversal Binary Tree	62.45%	Medium
19	All Paths With Given Sum	Tree Traversal Binary Tree	74.23%	Medium
20	Maximum Root to Leaf Path Sum	Tree Traversal Binary Tree	72.15%	Medium
21	Count Non-Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	60.48%	Easy
22	Minimum Depth of Binary Tree	Tree Traversal Binary Tree	60.25%	Medium
23	Construct Tree from Inorder + Preorder	Tree Traversal Binary Tree	70.00%	Medium
24	Right View of Binary Tree	Tree Traversal Binary Tree	74.36%	Medium
25	Lowest Common Ancestor in BST	Tree Traversal Binary Tree	70.50%	Medium
26	Kth Smallest Element in BST	Tree Traversal Binary Tree	76.77%	Medium
27	Maximum Path Sum in Binary Tree	Tree Traversal Binary Tree	58.59%	Hard
28	Delete Node In BST	Tree Traversal Binary Tree	65.20%	Medium
29	Validate BST	Tree Traversal Binary Tree	45.23%	Medium
30	Search / Insert into BST	Tree Traversal Binary Tree	89.54%	Easy
31	Find Nodes at Distance K from Given Node	Tree Traversal Binary Tree	65.95%	Hard
32	Lowest Common Ancestor of Binary Tree	Tree Traversal Binary Tree	78.59%	Medium
33	Print All Root To Leaf Paths	Tree Traversal Binary Tree	68.59%	Hard
34	Root To Leaf Path Sum	Tree Traversal Binary Tree	78.56%	Medium
35	Diameter of Binary Tree	Tree Traversal Binary Tree	73.45%	Medium
36	Check Binary Tree Is Balanced	Tree Traversal Binary Tree	78.95%	Medium
37	Check if Tree is Symmetric	Tree Traversal Binary Tree	74.98%	Medium
38	Check if Two Trees are Identical	Tree Traversal Binary Tree	76.59%	Medium
39	Count Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	74.59%	Medium
40	Count Total Nodes in Binary Tree	Tree Traversal Binary Tree	75.68%	Medium
41	Height / Max Depth of Binary Tree	Tree Traversal Binary Tree	75.36%	Medium
42	Binary Tree Zigzag Level Order Traversal	Tree Recursion Traversal Binary Tree	71.48%	Medium
43	Binary Tree Level Order Traversal	Tree Recursion Traversal Binary Tree	79.68%	Easy
44	Binary Tree Inorder Traversal	Recursion Trees Traversal Binary Tree	75.68%	Easy
45	Binary Tree Preorder Traversal	Tree Recursion Binary Tree	79.85%	Easy
46	Intersection of Two Linked Lists	Linked List	75.00%	Medium
47	Sort A Linked List (Merge Sort)	Linked List	58.00%	Medium
48	Merge K Sorted Lists	Linked List	70.00%	Medium
49	Merge Two Sorted Linked Lists	Link List	59.00%	Medium
50	Swap Nodes in Pairs	Linked List	65.00%	Medium