Videos

• Complete Recursion Course

Problems

Easy

• Sum Triangle from Array GFG
• Maximum and Minimum value in an array GFG
• Binary Search using recursion leetcode
• First Uppercase Letter in a String GFG
• Reverse String leetcode
• Print 1 To N Without Loop GFG
• Fibonacci Number leetcode
• Special Fibonacci CodeChef
• Length of string using Recursion GFG
• Geek-onacci Number GFG
• Recursive Bubble Sort GFG
• Recursive Insertion Sort GFG
• Sum of digit of a number using Recursion GFG
• Product of two numbers using Recursion GFG
• Check Prime or not GFG
• Sum of Natural numbers using Recursion GFG
• Power of Two leetcode
• Power of Three leetcode
• Power of Four leetcode
• Write a recursive function for given n and a to determine x:

      n = a ^ x 
      a = 2, 3, 4
      (2 ^ -31) <= n <= (2 ^ 31) - 1      

• Write a recursive function that returns the factorial of a number. HackerRank
• Write a recursive function to check whether an array is sorted or not. GFG
• Number of Steps to Reduce a Number to Zero. leetcode
• Check for balanced paranthesis using recursion without stack. GFG
• Remove consecutive duplicate characters from a string. GFG
• Print all possible palindromic partitions of a string. GFG
• Power Set of permutations of a string in Lexicographic order. GFG

Medium

• Combination Sum leetcode
• Word Search leetcode
• Target sum leetcode
• Find Kth Bit in Nth Binary String leetcode
• K-th Symbol in Grammar leetcode
• Count Good Numbers leetcode
• N Digit numbers with digits in increasing order GFG
• Pow(x, n) leetcode
• Minimum Non-Zero Product of the Array Elements leetcode
• Handshakes GFG
• HackerRank
• Divisible Subset Codechef
• Perfect squaresleetcode
• decode stringleetcode
• find the winner of the circular game leetcode
• Different ways to add parantheses in the expression leetcode
• Letter Combinations of a Phone Number leetcode
• Predict the winner. leetcode
• Gray code GFG Google
• Combination Sum II leetcode
• combination Sum III leetcode
• Sudoku Solver leetcode
• Letter tile possibilities leetcode
• All Paths From Source to Target leetcode
• Sort a stack using recursion GFG
• Reverse a stack using recursion GFG
• Beautiful Arrangement leetcode
• Lowest Common Ancestor of a Binary Tree GFG Amex
• Prime numbers after prime P with sum S GFG
• Path with Maximum Gold leetcode
• Longest Possible Route in a Matrix with Hurdles GFG
• Tug of war GFG Adobe
• Rat in a maze GFG
• Reorder List leetcode

Hard

• Parsing A Boolean Expression leetcode
• Special Binary String leetcode
• Permutation Sequence leetcode
• Next Happy Number GFG
• Basic Calculator leetcode
• Integer to English Words leetcode
• Maximize Number of Nice Divisors leetcode
• N Queens leetcode
• N Queens II leetcode
• Word break II leetcode Google
• Unique paths III leetcode
• Find shortest safe route in a path with landmines GFG Google
• Minimum steps to destination GFG Amex Adobe
• Hamiltonian Cycle GFG
• M colorning problem GFG
• The Knight's tour GFG
• Maximum number possible by doing at-most K swaps GFG
• HackerRank
• Concatenated Wordsleetcode