Problems

# Status Problem Level Completes Likes
386

Backtracking - N Queens Problem - Better Solution

Hard % 0
387

Backtracking - N Queens Problem

Hard % 0
388

Find the Kth Smallest/Largest Element in an Array

Beginner % 0
389

Priority Queue in Data Structure

Beginner % 0
390

Find the Second Largest Element in an Array

Beginner % 0
391

Breadth-First Search/Traversal in a Graph.

Hard % 0
392

Breadth-First Search/Traversal in a Binary Tree

Beginner % 0
393

Sort Names by their Last Names.

Beginner % 0
394

Backtracking - Rat In A Maze Puzzle

Hard % 0
395

Backtracking - SUDOKU Solver

Hard % 0
396

Introduction To Backtracking Programming

Beginner % 0
397

Dynamic Programming - Stairs Climbing Puzzle

Beginner % 0
398

Dynamic Programming - Minimum Coin Change Problem

Medium % 0
399

Introduction To Dynamic Programming - Fibonacci Series

Beginner % 0
400

Merge K Sorted Arrays

Hard % 0
401

Find the Deepest Left Node in a Binary Tree.

Medium % 0
402

Find a Number occurring odd number of times in a Given array

Beginner % 0
403

Rearrange the Array of Given Range N, such that A[i]=i

Medium % 1
404

Find a Missing Number From a Sequence of Consecutive Numbers | XOR Method

Beginner % 0
405

Find the Max element in a Given Binary Tree

Beginner % 0
406

Populate Next Siblings Pointers in a Given Binary Tree OR Populate Next Right Pointers in Each Node

Hard % 0
407

Check If One Binary is Mirror Tree of another Binary Tree.

Beginner % 0
409

Diameter Of a Binary Tree

Hard % 1
410

Do the Reverse Level Order Traversal in a binary tree

Medium % 0
411

Find the Deepest Node in a Binary Tree.

Medium % 0
412

Find the Height of a tree without using Recursion

Medium % 0
414

Binary Min-Max Heap Implementation

Hard % 0
415

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

Beginner % 0
416

Find numbers that are palindrome in the decimal and octal Representations

Beginner % 0
417

Find All the Well Ordered Permutations of a Given String.

Medium % 0
418

Find the Increasing Triplet Sub-sequence in an array

Medium % 0
419

Construct a Special Triangle from a Given Array

Beginner % 0
420

Colorful Numbers

Hard % 0

Backtracking - N Queens Problem - Better Solution

Backtracking - N Queens Problem

Find the Kth Smallest/Largest Element in an Array

Priority Queue in Data Structure

Find the Second Largest Element in an Array

Breadth-First Search/Traversal in a Graph.

Breadth-First Search/Traversal in a Binary Tree

Sort Names by their Last Names.

Backtracking - Rat In A Maze Puzzle

Backtracking - SUDOKU Solver

Introduction To Backtracking Programming

Dynamic Programming - Stairs Climbing Puzzle

Dynamic Programming - Minimum Coin Change Problem

Introduction To Dynamic Programming - Fibonacci Series

Merge K Sorted Arrays

Find the Deepest Left Node in a Binary Tree.

Find a Number occurring odd number of times in a Given array

Rearrange the Array of Given Range N, such that A[i]=i

Find a Missing Number From a Sequence of Consecutive Numbers | XOR Method

Find the Max element in a Given Binary Tree

Populate Next Siblings Pointers in a Given Binary Tree OR Populate Next Right Pointers in Each Node

Check If One Binary is Mirror Tree of another Binary Tree.

Diameter Of a Binary Tree

Do the Reverse Level Order Traversal in a binary tree

Find the Deepest Node in a Binary Tree.

Find the Height of a tree without using Recursion

Binary Min-Max Heap Implementation

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