# Status Problem video Level Completes Likes 380 Count the number of nodes in a given binary tree Beginner % 0 378 Longest contiguous character in a given String - O(N) Solution Beginner % 0 376 Collatz Conjecture - Steps to transform Number to 1 Beginner % 0 375 String to Integer (AtoI - ASCII to Integer) Beginner % 1 374 Find all Prime Numbers less than equal to N | Set 1 Beginner % 0 370 Find third largest element in a given array Beginner % 0 369 Find duplicates Characters in the given String Beginner % 0 367 Sum of all Unique elements in a given array Beginner % 0 366 Java program to find the largest element in array Beginner % 0 364 Find three smallest elements in a given array Beginner % 0 362 Stack Java Class - Explained Beginner % 0 358 Infix, Postfix and Prefix Notations/Expressions Beginner % 0 357 Count Set bits in a given Number Beginner % 1 356 Check if array contains all unique or distinct numbers Beginner % 0 355 Product of all Unique elements in a given array Beginner % 0 353 Reverse a given number Beginner % 1 352 Check if given number is perfect square - O(√N) Solution Beginner % 0 350 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 % 0 346 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 % 0 342 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 % 1 337 Find first two largest elements in a given array Beginner % 0 336 Calculate Logn base r – Java Implementation Beginner % 0 333 Sum the elements of an Array Beginner % 0 332 Insertion Sort Beginner % 0 331 Find Largest and Smallest word in a given String Beginner % 0 330 Check if Given Number is power of 2 Beginner % 1 329 Rotate the given array in cycles Beginner % 0 327 Print First n numbers in Fibonacci Series Beginner % 0 Count the number of nodes in a given binary tree Longest contiguous character in a given String - O(N) Solution Collatz Conjecture - Steps to transform Number to 1 String to Integer (AtoI - ASCII to Integer) Find all Prime Numbers less than equal to N | Set 1 Find third largest element in a given array Find duplicates Characters in the given String Sum of all Unique elements in a given array Java program to find the largest element in array Find three smallest elements in a given array Stack Java Class - Explained Infix, Postfix and Prefix Notations/Expressions Count Set bits in a given Number Check if array contains all unique or distinct numbers Product of all Unique elements in a given array Reverse a given number Check if given number is perfect square - O(√N) Solution Find first three largest elements in a given array Selection Sort Print Number with its Sign in Java Valid Brackets – Part 2 | Stack Method Find the roots of Quadratic Equation – Java Program Given two strings validate the output string 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 first two largest elements in a given array Calculate Logn base r – Java Implementation Sum the elements of an Array Insertion Sort Find Largest and Smallest word in a given String Check if Given Number is power of 2 Rotate the given array in cycles Print First n numbers in Fibonacci Series 1 2 3 4 5 6 7
