Latest DSA Problems & Practice | Improve Coding with ScholarHat

DSA Problems

Practice real interview questions and track your progress

234 problems

#	Title	Topics	Acceptance	Difficulty
1	Redundant Connection	Graph	68.71%	Medium
2	Detect Cycle in Undirected Graph (DFS)	Graph	67.77%	Medium
3	Path Existence Between Two Nodes	Graph	80.12%	Easy
4	Detect Cycle in Directed Graph (DFS)	Graph	67.67%	Medium
5	Level of Each Node	Graph	74.21%	Medium
6	BFS Traversal	Graph	83.12%	Easy
7	DFS Traversal	Graph DFS Traversal	85.64%	Easy
8	Flood Fill	Recursion	69.00%	Medium
9	Number of Islands	Recursion	66.00%	Medium
10	Remove Duplicates From A String	String Stack	61.68%	Easy
11	Remove Consecutive Duplicates	Recursion	60.00%	Easy
12	Find Element in a Sorted Array	Binary Search	80.00%	Easy
13	Binary Tree Cameras	Tree Traversal Binary Tree	55.21%	Hard
14	Boundary Traversal	Tree Traversal Binary Tree	45.21%	Hard
15	Compare Leaf Traversal	Tree Traversal Binary Tree	77.95%	Medium
16	Binary Tree Post Order Traversal	Tree Recursion Traversal Binary Tree	79.59%	Easy
17	Inorder Successor in BST	Tree Traversal Binary Tree	60.12%	Medium
18	Kth Largest Element in BST	Tree Traversal Binary Tree	70.53%	Medium
19	Construct Tree from Inorder + Postorder	Tree Traversal Binary Tree	65.12%	Medium
20	Top View of Binary Tree	Tree Traversal Binary Tree	60.21%	Medium
21	Convert Sorted Array to BST	Tree Traversal Binary Tree	74.56%	Medium
22	Find Maximum in BST	Tree Traversal Binary Tree	85.54%	Easy
23	Find Minimum in BST	Tree Traversal Binary Tree	85.18%	Easy
24	Find Distance Between Two Nodes	Tree Traversal Binary Tree	62.45%	Medium
25	All Paths With Given Sum	Tree Traversal Binary Tree	74.23%	Medium
26	Maximum Root to Leaf Path Sum	Tree Traversal Binary Tree	72.15%	Medium
27	Count Non-Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	60.48%	Easy
28	Minimum Depth of Binary Tree	Tree Traversal Binary Tree	60.25%	Medium
29	Construct Tree from Inorder + Preorder	Tree Traversal Binary Tree	70.00%	Medium
30	Right View of Binary Tree	Tree Traversal Binary Tree	74.36%	Medium
31	Lowest Common Ancestor in BST	Tree Traversal Binary Tree	70.50%	Medium
32	Kth Smallest Element in BST	Tree Traversal Binary Tree	76.77%	Medium
33	Maximum Path Sum in Binary Tree	Tree Traversal Binary Tree	58.59%	Hard
34	Delete Node In BST	Tree Traversal Binary Tree	65.20%	Medium
35	Validate BST	Tree Traversal Binary Tree	45.23%	Medium
36	Search / Insert into BST	Tree Traversal Binary Tree	89.54%	Easy
37	Find Nodes at Distance K from Given Node	Tree Traversal Binary Tree	65.95%	Hard
38	Lowest Common Ancestor of Binary Tree	Tree Traversal Binary Tree	78.59%	Medium
39	Print All Root To Leaf Paths	Tree Traversal Binary Tree	68.59%	Hard
40	Root To Leaf Path Sum	Tree Traversal Binary Tree	78.56%	Medium
41	Diameter of Binary Tree	Tree Traversal Binary Tree	73.45%	Medium
42	Check Binary Tree Is Balanced	Tree Traversal Binary Tree	78.95%	Medium
43	Check if Tree is Symmetric	Tree Traversal Binary Tree	74.98%	Medium
44	Check if Two Trees are Identical	Tree Traversal Binary Tree	76.59%	Medium
45	Count Leaf Nodes In Binary Tree	Tree Traversal Binary Tree	74.59%	Medium
46	Count Total Nodes in Binary Tree	Tree Traversal Binary Tree	75.68%	Medium
47	Height / Max Depth of Binary Tree	Tree Traversal Binary Tree	75.36%	Medium
48	Binary Tree Zigzag Level Order Traversal	Tree Recursion Traversal Binary Tree	71.48%	Medium
49	Binary Tree Level Order Traversal	Tree Recursion Traversal Binary Tree	79.68%	Easy
50	Binary Tree Inorder Traversal	Recursion Trees Traversal Binary Tree	75.68%	Easy