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DSA Problems

Practice real interview questions and track your progress

240 problems

#	Title	Topics	Acceptance	Difficulty
1	Find the Second Smallest of Four Numbers	Array Sorting Algorithms	89.85%
2	Find the Second Largest of Four Numbers	Array Sorting Algorithms	89.48%
3	Game with String	Heap	53.96%	Medium
4	Kth largest element	Heap	64.92%	Medium
5	Min Number of Jumps	Dynamic Programming	50.48%	Medium
6	House Robber	Dynamic Programming	51.45%	Medium
7	Min Cost Climbing Stairs	Dynamic Programming	65.21%	Easy
8	Odd Even Graph Check	Graph	63.45%	Medium
9	Redundant Connection	Graph	68.71%	Medium
10	Detect Cycle in Undirected Graph (DFS)	Graph	67.77%	Medium
11	Path Existence Between Two Nodes	Graph	80.12%	Easy
12	Detect Cycle in Directed Graph (DFS)	Graph	67.67%	Medium
13	Level of Each Node	Graph	74.21%	Medium
14	BFS Traversal	Graph	83.12%	Easy
15	DFS Traversal	Graph DFS Traversal	85.64%	Easy
16	Flood Fill	Recursion	69.00%	Medium
17	Number of Islands	Recursion	66.00%	Medium
18	Remove Duplicates From A String	String Stack	61.68%	Easy
19	Remove Consecutive Duplicates	Recursion	60.00%	Easy
20	Find Element in a Sorted Array	Binary Search	80.00%	Easy
21	Binary Tree Cameras	Tree Traversal Binary Tree	55.21%	Hard
22	Boundary Traversal	Tree Traversal Binary Tree	45.21%	Hard
23	Compare Leaf Traversal	Tree Traversal Binary Tree	77.95%	Medium
24	Binary Tree Post Order Traversal	Tree Recursion Traversal Binary Tree	79.59%	Easy
25	Inorder Successor in BST	Tree Traversal Binary Tree	60.12%	Medium
26	Kth Largest Element in BST	Tree Traversal Binary Tree	70.53%	Medium
27	Construct Tree from Inorder + Postorder	Tree Traversal Binary Tree	65.12%	Medium
28	Top View of Binary Tree	Tree Traversal Binary Tree	60.21%	Medium
29	Convert Sorted Array to BST	Tree Traversal Binary Tree	74.56%	Medium
30	Find Maximum in BST	Tree Traversal Binary Tree	85.54%	Easy
31	Find Minimum in BST	Tree Traversal Binary Tree	85.18%	Easy
32	Find Distance Between Two Nodes	Tree Traversal Binary Tree	62.45%	Medium
33	All Paths With Given Sum	Tree Traversal Binary Tree	74.23%	Medium
34	Maximum Root to Leaf Path Sum	Tree Traversal Binary Tree	72.15%	Medium
35	Count Non-Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	60.48%	Easy
36	Minimum Depth of Binary Tree	Tree Traversal Binary Tree	60.25%	Medium
37	Construct Tree from Inorder + Preorder	Tree Traversal Binary Tree	70.00%	Medium
38	Right View of Binary Tree	Tree Traversal Binary Tree	74.36%	Medium
39	Lowest Common Ancestor in BST	Tree Traversal Binary Tree	70.50%	Medium
40	Kth Smallest Element in BST	Tree Traversal Binary Tree	76.77%	Medium
41	Maximum Path Sum in Binary Tree	Tree Traversal Binary Tree	58.59%	Hard
42	Delete Node In BST	Tree Traversal Binary Tree	65.20%	Medium
43	Validate BST	Tree Traversal Binary Tree	45.23%	Medium
44	Search / Insert into BST	Tree Traversal Binary Tree	89.54%	Easy
45	Find Nodes at Distance K from Given Node	Tree Traversal Binary Tree	65.95%	Hard
46	Lowest Common Ancestor of Binary Tree	Tree Traversal Binary Tree	78.59%	Medium
47	Print All Root To Leaf Paths	Tree Traversal Binary Tree	68.59%	Hard
48	Root To Leaf Path Sum	Tree Traversal Binary Tree	78.56%	Medium
49	Diameter of Binary Tree	Tree Traversal Binary Tree	73.45%	Medium
50	Check Binary Tree Is Balanced	Tree Traversal Binary Tree	78.95%	Medium