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 356 Check if array contains all unique or distinct numbers Beginner % 0 355 Product of all Unique elements in a given array Beginner % 0 354 Valid Multiple Parentheses Medium % 1 353 Reverse a given number Beginner % 1 352 Check if given number is perfect square - O(√N) Solution Beginner % 0 351 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 % 0 349 Selection Sort Beginner % 0 348 Print Number with its Sign in Java Beginner % 0 347 Find the nearest building which has bike | Find nearest specific vertex from source in a graph. Hard % 0 346 Valid Brackets – Part 2 | Stack Method Beginner % 0 345 Find the roots of Quadratic Equation – Java Program Beginner % 0 344 Given two strings validate the output string Beginner % 0 343 Generate all the strings of length n from 0 to k-1 Medium % 0 342 Find two smallest elements in a given array Beginner % 0 341 Front and Back Search in an Array Beginner % 0 340 Print all Unique elements in a given array Beginner % 0 339 Multiply with power of 2 without using pow() or * operator Beginner % 1 338 Find Number of reverse pairs in an array Hard % 1 337 Find first two largest elements in a given array Beginner % 0 Check if array contains all unique or distinct numbers Product of all Unique elements in a given array Valid Multiple Parentheses Reverse a given number Check if given number is perfect square - O(√N) Solution Least Recently Used (LRU) Cache – Using HashMap and Doubly Linked List | Set 1 Find first three largest elements in a given array Selection Sort Print Number with its Sign in Java Find the nearest building which has bike | Find nearest specific vertex from source in a graph. Valid Brackets – Part 2 | Stack Method Find the roots of Quadratic Equation – Java Program Given two strings validate the output string Generate all the strings of length n from 0 to k-1 Find two smallest elements in a given array Front and Back Search in an Array Print all Unique elements in a given array Multiply with power of 2 without using pow() or * operator Find Number of reverse pairs in an array Find first two largest elements in a given array 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
