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Top 20 Problems on Dynamic programming

Top 10 Problems on Backtracking

Top 20 Problems on Graph

Top 25 Problems on Trees

Top 10 Problems on Bits Manipulation

Top 15 Problems in LinkedList

All Problems

# Status Problem video Level Completes Likes
98

Construct Binary Search Tree from a given Preorder Traversal Using Stack (Without Recursion)

Hard % 0
97

Construct Binary Search Tree from a given Preorder Traversal using Recursion

Hard % 0
94

Depth First Search/Traversal in Binary Tree

Beginner % 0
93

Inorder Predecessor and Successor in Binary Search Tree

Hard % 0
92

Check if Array Contains All Elements Of Some Given Range

Medium % 0
91

Check if Array is Consecutive Integers

Beginner % 0
90

Find Subarray with Sum Equal to a Target Value

Medium % 0
89

Find Smallest Subarray Exceeding a Target Sum

Medium % 0
88

Rearrange Array: Positive and Negative Elements Alternating

Hard % 0
87

Find Intersection of Two Sorted Arrays

Beginner % 0
86

Find Kth Smallest or Largest element in an Array

Medium % 0
85

Find Maximum Distance Between Increasing Elements in Array

Medium % 0
84

Elements in an Array Occurring More Than N/K Times

Hard % 0
83

Find Element in Rotated Sorted Array

Medium % 0
81

Find Nodes X Levels Up from Leaf Nodes in a Tree

Medium % 0
80

Find Nodes at Distance X from Root in a Tree

Medium % 0
79

Calculate Distance Between Nodes in a Binary Tree

Hard % 0
78

Root-to-Node Distance in Binary Tree: How to Find

Medium % 0
77

Construct a binary tree from given Inorder and Postorder Traversal

Hard % 0
76

Calculate Vertical Sum in Binary Tree

Medium % 0
74

Lowest Common Ancestor in a Binary Tree (Not Binary Search Tree).

Hard % 0
73

Lowest Common Ancestor in a Binary Search Tree.

Medium % 0
72

Make a Binary Tree from Given Inorder and Preorder Traversal

Hard % 0
71

Given a binary tree, find out the maximum sum of value from root to each leaf

Medium % 0
70

Reversing Alternate Levels in a Binary Tree

Medium % 0
69

Convert Sorted Singly Linked List to Balanced Binary Search Tree

Medium % 1
68

Transforming a Binary Tree into its Mirror Image

Beginner % 0
67

Printing Nodes without Siblings in a Binary Tree

Beginner % 0
66

Convert a Sorted Doubly Linked List to Balanced BST

Medium % 1
65

Given a binary tree, Find the Maximum Path Sum between Any Two Leaves

Medium % 0

Construct Binary Search Tree from a given Preorder Traversal Using Stack (Without Recursion)

Construct Binary Search Tree from a given Preorder Traversal using Recursion

Depth First Search/Traversal in Binary Tree

Inorder Predecessor and Successor in Binary Search Tree

Check if Array Contains All Elements Of Some Given Range

Check if Array is Consecutive Integers

Find Subarray with Sum Equal to a Target Value

Find Smallest Subarray Exceeding a Target Sum

Rearrange Array: Positive and Negative Elements Alternating

Find Intersection of Two Sorted Arrays

Find Kth Smallest or Largest element in an Array

Find Maximum Distance Between Increasing Elements in Array

Elements in an Array Occurring More Than N/K Times

Find Element in Rotated Sorted Array

Find Nodes X Levels Up from Leaf Nodes in a Tree

Find Nodes at Distance X from Root in a Tree

Calculate Distance Between Nodes in a Binary Tree

Root-to-Node Distance in Binary Tree: How to Find

Construct a binary tree from given Inorder and Postorder Traversal

Calculate Vertical Sum in Binary Tree

Lowest Common Ancestor in a Binary Tree (Not Binary Search Tree).

Lowest Common Ancestor in a Binary Search Tree.

Make a Binary Tree from Given Inorder and Preorder Traversal

Given a binary tree, find out the maximum sum of value from root to each leaf

Reversing Alternate Levels in a Binary Tree

Convert Sorted Singly Linked List to Balanced Binary Search Tree

Transforming a Binary Tree into its Mirror Image

Printing Nodes without Siblings in a Binary Tree

Convert a Sorted Doubly Linked List to Balanced BST

Given a binary tree, Find the Maximum Path Sum between Any Two Leaves