Featured Lists 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 362 Stack Java Class - Explained Beginner % 0 359 Merge K sorted Linked List - Using Priority Queue Hard % 0 358 Infix, Postfix and Prefix Notations/Expressions Beginner % 0 353 Reverse a given number Beginner % 1 351 Least Recently Used (LRU) Cache – Using HashMap and Doubly Linked List | Set 1 Hard % 1 350 Find first three largest elements in a given array Beginner % 0 344 Given two strings validate the output string Beginner % 0 338 Find Number of reverse pairs in an array Hard % 1 334 Dijkstra Algorithm Implementation – TreeSet Hard % 0 330 Check if Given Number is power of 2 Beginner % 1 318 Calculate Log2n without using built-in function Beginner % 1 313 Check if two Strings are equal without using built-in function Beginner % 0 312 Remove Vowels from a given String Beginner % 0 305 Find number of Distinct Permutations of a String Medium % 0 301 Bitwise Trick: Divide by Powers of 2 Without Operators Beginner % 1 293 Convert Number to base 3 String Representation Beginner % 1 290 Reverse a String using Recursion Beginner % 0 277 Graph – Count all paths between source and destination Medium % 1 276 Graph – Find Number of non reachable vertices from a given vertex Medium % 0 275 Graph – Detect Cycle in a Directed Graph using colors Hard % 0 274 Graph – Detect Cycle in an Undirected Graph using DFS Medium % 0 272 Graph – Software Installation Problem Medium % 0 262 Count and print all Subarrays with product less than K in O(n) Hard % 0 261 Sliding Window Algorithm (Track the maximum of each subarray of size k) Hard % 0 256 Print all sub sequences of a given array Hard % 0 253 Print all subarrays of a given array Medium % 0 252 Text Justification Problem (OR Word Wrap Problem) - Leetcode 68 Hard % 0 251 Dynamic Programming - Egg Dropping Problem Hard % 0 249 Divide and Conquer - Rearrange array elements in special order Medium % 0 244 Dynamic programming - Remove Boxes Problem | leetcode Hard % 0 242 Find the Bit Flips Needed: Convert One Binary Number to Another Beginner % 1 240 All elements appears thrice and one element appears once. Find that element in O(n) time and O(1) space Hard % 1 239 Find local minimum or local maximum in O(1) Medium % 0 233 Find the local minima in a given array Medium % 0 231 Check if array is sorted using recursion Beginner % 0 Stack Java Class - Explained Merge K sorted Linked List - Using Priority Queue Infix, Postfix and Prefix Notations/Expressions Reverse a given number Least Recently Used (LRU) Cache – Using HashMap and Doubly Linked List | Set 1 Find first three largest elements in a given array Given two strings validate the output string Find Number of reverse pairs in an array Dijkstra Algorithm Implementation – TreeSet Check if Given Number is power of 2 Calculate Log2n without using built-in function Check if two Strings are equal without using built-in function Remove Vowels from a given String Find number of Distinct Permutations of a String Bitwise Trick: Divide by Powers of 2 Without Operators Convert Number to base 3 String Representation Reverse a String using Recursion Graph – Count all paths between source and destination Graph – Find Number of non reachable vertices from a given vertex Graph – Detect Cycle in a Directed Graph using colors Graph – Detect Cycle in an Undirected Graph using DFS Graph – Software Installation Problem Count and print all Subarrays with product less than K in O(n) Sliding Window Algorithm (Track the maximum of each subarray of size k) Print all sub sequences of a given array Print all subarrays of a given array Text Justification Problem (OR Word Wrap Problem) - Leetcode 68 Dynamic Programming - Egg Dropping Problem Divide and Conquer - Rearrange array elements in special order Dynamic programming - Remove Boxes Problem | leetcode Find the Bit Flips Needed: Convert One Binary Number to Another All elements appears thrice and one element appears once. Find that element in O(n) time and O(1) space Find local minimum or local maximum in O(1) Find the local minima in a given array Check if array is sorted using recursion 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
