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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
456

Find the Index from which 0 starts

Beginner % 0
457

Find the increasing OR decreasing point in an array

Beginner % 0
458

Find remainder without using modulo operator

Beginner % 0
459

Swap two numbers without using extra variable

Beginner % 0
460

Maximum difference between two elements where larger element appears after the smaller element

Medium % 0
461

Find the two repeating elements in a given array | 6 Approaches

Medium % 1
462

Find the element which appears maximum number of times in the array.

Medium % 0
463

Find duplicates in an given array in O(n) time and O(1) extra space.

Medium % 0
464

Find the last non repeating character in a given string.

Beginner % 0
465

Find the last repeating character in a given string.

Beginner % 0
466

k-Nearest Neighbors

Hard % 0
467

Reverse the given Array without using built in function

Beginner % 0
468

Dynamic Programming - Split the String into Minimum number of Palindromes.

Hard % 0
469

Convert Binary Tree into Threaded Binary Tree

Hard % 0
470

Double Threaded Binary Tree Complete Implementation

Hard % 0
471

Single Threaded Binary Tree Complete Implementation

Hard % 0
472

Introduction to Threaded Binary Tree

Medium % 0
473

Implement Stack Using Linked List

Beginner % 0
474

Doubly Linked List Complete Implementation

Beginner % 0
475

Circular Linked List Complete Implementation

Beginner % 0
476

Generate Maximum revenue by selling K tickets from N windows

Medium % 0
477

Search the Element in a binary tree - With and Without Recursion

Beginner % 0
478

Generate Well Ordered Passwords of a Given Length K

Medium % 0
479

All N Length Strings from Given String of Length K

Medium % 0
480

Backtracking - N Queens Problem

Hard % 0
481

Find the Kth Smallest/Largest Element in an Array

Beginner % 0
482

Priority Queue in Data Structure

Beginner % 0
483

Sort Names by their Last Names.

Beginner % 0
484

Find the Deepest Left Node in a Binary Tree.

Medium % 0
485

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

Medium % 0
486

Find the Max element in a Given Binary Tree

Beginner % 0
487

Do the Reverse Level Order Traversal in a binary tree

Medium % 0
488

Find the Height of a tree without using Recursion

Medium % 0
489

Binary Min-Max Heap Implementation

Hard % 0
490

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

Beginner % 0

Find the Index from which 0 starts

Find the increasing OR decreasing point in an array

Find remainder without using modulo operator

Swap two numbers without using extra variable

Maximum difference between two elements where larger element appears after the smaller element

Find the two repeating elements in a given array | 6 Approaches

Find the element which appears maximum number of times in the array.

Find duplicates in an given array in O(n) time and O(1) extra space.

Find the last non repeating character in a given string.

Find the last repeating character in a given string.

k-Nearest Neighbors

Reverse the given Array without using built in function

Dynamic Programming - Split the String into Minimum number of Palindromes.

Convert Binary Tree into Threaded Binary Tree

Double Threaded Binary Tree Complete Implementation

Single Threaded Binary Tree Complete Implementation

Introduction to Threaded Binary Tree

Implement Stack Using Linked List

Doubly Linked List Complete Implementation

Circular Linked List Complete Implementation

Generate Maximum revenue by selling K tickets from N windows

Search the Element in a binary tree - With and Without Recursion

Generate Well Ordered Passwords of a Given Length K

All N Length Strings from Given String of Length K

Backtracking - N Queens Problem

Find the Kth Smallest/Largest Element in an Array

Priority Queue in Data Structure

Sort Names by their Last Names.

Find the Deepest Left Node in a Binary Tree.

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

Find the Max element in a Given Binary Tree

Do the Reverse Level Order Traversal 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.