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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

All Problems

# Status Problem Level Completes Likes
421

Magic Index - Find Index In Sorted Array Such That A[i] = i.

Beginner % 0
422

Find numbers that are palindrome in the decimal and octal Representations

Beginner % 0
423

Find All the Well Ordered Permutations of a Given String.

Medium % 0
424

Find the Increasing Triplet Sub-sequence in an array

Medium % 0
425

Construct a Special Triangle from a Given Array

Beginner % 0
426

Colorful Numbers

Hard % 1
427

Goldbach's Conjecture

Beginner % 0
429

Convert Decimal into Irreducible Fraction

Beginner % 0
430

Clock Angle Problem

Beginner % 1
432

Track the Maximum Element in a Stack.

Medium % 1
434

Graph Representation - Adjacency Matrix and Adjacency List

Beginner % 2
435

Counting Sort

Medium % 0
436

Towers Of Hanoi

Beginner % 0
437

Generate All Strings of n bits.

Medium % 1
438

Find The Missing Duplicate in a Given Array.

Beginner % 1
439

Sort 3 Integers without using if condition OR use only Max() function.

Beginner % 0
440

Euclidean algorithm - Greatest Common Divisor(GCD)

Beginner % 0
441

Implement Queue Using Stacks

Medium % 0
442

Alternate Splitting of a given Linked List

Medium % 0
443

Reverse The Doubly Linked List

Medium % 0
444

Swap Kth Node from the front with the Kth Node from the End

Medium % 0
446

Delete X Nodes After Y Nodes In a Linked List

Beginner % 0
447

Merge Sort in a Linked list

Medium % 0
448

Merge a Linked list into another Linked List at Alternate Positions.

Medium % 0
449

AVL Tree - Insertion

Hard % 0
450

Construct a binary tree from given Inorder and Level Order Traversal

Hard % 0
451

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

Hard % 0
452

Construct Binary Search Tree from a given Preorder Traversal using Recursion

Hard % 0
455

Depth First Search/Traversal in Binary Tree

Beginner % 0

Magic Index - Find Index In Sorted Array Such That A[i] = i.

Find numbers that are palindrome in the decimal and octal Representations

Find All the Well Ordered Permutations of a Given String.

Find the Increasing Triplet Sub-sequence in an array

Construct a Special Triangle from a Given Array

Colorful Numbers

Goldbach's Conjecture

Convert Decimal into Irreducible Fraction

Clock Angle Problem

Track the Maximum Element in a Stack.

Graph Representation - Adjacency Matrix and Adjacency List

Counting Sort

Towers Of Hanoi

Generate All Strings of n bits.

Find The Missing Duplicate in a Given Array.

Sort 3 Integers without using if condition OR use only Max() function.

Euclidean algorithm - Greatest Common Divisor(GCD)

Implement Queue Using Stacks

Alternate Splitting of a given Linked List

Reverse The Doubly Linked List

Swap Kth Node from the front with the Kth Node from the End

Delete X Nodes After Y Nodes In a Linked List

Merge Sort in a Linked list

Merge a Linked list into another Linked List at Alternate Positions.

AVL Tree - Insertion

Construct a binary tree from given Inorder and Level Order Traversal

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