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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

Find the Increasing Triplet Sub-sequence in an array

Medium % 0
422

Construct a Special Triangle from a Given Array

Beginner % 0
423

Colorful Numbers

Hard % 0
424

Goldbach's Conjecture

Beginner % 0
426

Convert Decimal into Irreducible Fraction

Beginner % 0
427

Clock Angle Problem

Beginner % 1
429

Track the Maximum Element in a Stack.

Medium % 0
431

Graph Representation - Adjacency Matrix and Adjacency List

Beginner % 2
432

Counting Sort

Medium % 0
433

Towers Of Hanoi

Beginner % 0
434

Generate All Strings of n bits.

Medium % 1
435

Find The Missing Duplicate in a Given Array.

Beginner % 1
436

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

Beginner % 0
437

Euclidean algorithm - Greatest Common Divisor(GCD)

Beginner % 0
438

Implement Queue Using Stacks

Medium % 0
439

Alternate Splitting of a given Linked List

Medium % 0
440

Reverse The Doubly Linked List

Medium % 0
441

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

Medium % 0
443

Delete X Nodes After Y Nodes In a Linked List

Beginner % 0
444

Merge Sort in a Linked list

Medium % 0
445

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

Medium % 0
446

AVL Tree - Insertion

Hard % 0
447

Construct a binary tree from given Inorder and Level Order Traversal

Hard % 0
448

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

Hard % 0
449

Construct Binary Search Tree from a given Preorder Traversal using Recursion

Hard % 0
452

Depth First Search/Traversal in Binary Tree

Beginner % 0
453

Inorder Predecessor and Successor in Binary Search Tree

Hard % 0
454

Check if Array Contains All Elements Of Some Given Range

Medium % 0
455

Check if Array is Consecutive Integers

Beginner % 0

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

Inorder Predecessor and Successor in Binary Search Tree

Check if Array Contains All Elements Of Some Given Range

Check if Array is Consecutive Integers