Site Map

Difficulty Levels



1Graph2Dynamic programming
3Strings4Binary Tree
5Arrays6Linked List
7Backtracking8Divide and Conquer
9Numbers10Priority Queue
15Sorting Techniques16Bit Manipulation Problems

Top Companies Interview Questions

7Bloomberg8Epic Systems
9Flipkart10Goldman Sachs

All Problems

Check if the given playlist of programs is valid2020-09-11 00:33:49
Maximum meetings in one room2020-09-10 00:18:10
Find the number of pairs with even XOR2020-09-06 14:15:44
Unresolved references error – Django in PyCharm and IntelliJ2020-09-06 00:10:55
Given an array, Find the number of all pairs with even sum2020-09-01 20:46:25
The number of cycles in a given array of integers.2020-08-24 22:11:42
Check if given sudoku is valid or not2020-08-21 22:22:08
Find Election Winner2020-08-19 23:24:44
Sort the indexes of the array as per the elements of the array2020-08-06 23:00:02
Construct the Largest number from the given digits2020-08-06 00:05:51
Print all subarrays using recursion2020-08-04 19:03:14
Find Lexicographically smallest or largest substring of size k2020-08-02 21:34:26
Largest word in dictionary by removing a few characters from the given string2020-08-01 23:19:34
Calculate (x^y)%z without using pow() function2020-07-01 23:36:34
Check if one string is a subsequence of another string.2020-06-17 23:39:48
Most frequent word2020-06-07 23:51:44
Efficient Robot Problem – Find Minimum Trips2020-06-05 22:40:40
Job Sequencing algorithm – Java2020-06-03 22:35:58
Find subarray with a sum to given number-2 | Handle negative numbers2020-06-01 23:39:40
Sort the two dimensional (2D) array – In-place2020-05-22 21:02:25
Implement/Design the version control map system2020-05-19 23:03:58
Given an array, count the number of pairs with a given sum.2020-05-17 21:10:53
Sort Map as per values – Java Program2020-05-07 22:59:13
Two Sum Problem2020-05-05 23:23:57
Find if any two intervals overlap in given intervals2020-04-16 23:43:47
Given an array, find the number of all pairs with odd sum.2020-04-14 23:37:28
Given an array, find all unique subsets with a given sum with allowed repeated digits.2020-04-13 00:06:20
Print all steps to convert one string to another string2020-04-09 00:35:33
Lexicographically next permutation With One swap2020-04-06 22:57:48
Find all subsets of size K from a given number N (1 to N)2020-04-04 22:54:52
Sum of distinct elements among two given sets2020-04-02 22:39:14
Find all possible combinations with sum K from a given number N(1 to N) with the repetition of numbers is allowed2020-03-22 22:55:27
Stable Marriage Problem – Gale–Shapley Algorithm – Java2020-03-14 23:08:29
Insert a node in the given sorted linked list.2020-02-17 22:30:38
Construct the largest number from the given array.2020-02-14 00:01:41
Given an array, find three-element sum closest to Zero2020-02-04 23:11:00
Print sorted unique elements of a given array2020-01-30 21:45:49
Given an array, print all unique subsets with a given sum.2020-01-26 22:16:21
Sum of length of subsets which contains given value K and all elements in subsets are less than equal to K.2020-01-20 21:59:47
Replace array elements with maximum element on the right.2020-01-18 20:26:28
Find all unique combinations of numbers (from 1 to 9 ) with sum to N2020-01-12 22:17:38
Number of Intervals in which given value lies2020-01-10 23:19:08
Unique Integers in array that sum up to zero.2020-01-08 21:59:39
Activity Selection Problem2020-01-06 21:38:14
Find the sum of overlapping elements in two sets2020-01-04 21:16:53
Given two coordinates, Print the line equation2020-01-02 21:56:43
Check if Graph is Bipartite – Adjacency List using Breadth-First Search(BFS)2019-12-30 22:29:10
Articulation Points OR Cut Vertices in a Graph2019-12-28 13:07:06
Print all middle elements of the given matrix/2D array.2019-12-26 21:19:54
Check If Given Undirected Graph is a tree2019-12-24 21:53:37
Find the number of distinct Islands OR connected components.2019-12-22 20:58:19
Check the completeness of given binary tree | Set 2 – Using Level Order Traversal2019-12-20 12:50:19
Depth-First Search (DFS) in 2D Matrix/2D-Array – Recursive Solution2019-12-18 21:00:32
Numbers with prime set bits in a given range using Sieve of Eratosthenes Algorithm2019-12-16 22:10:46
Print All Paths in Dijkstra’s Shortest Path Algorithm2019-12-14 15:47:26
Hamming Distance between two given integers2019-12-12 21:32:06
Breadth-First Search (BFS) in 2D Matrix/2D-Array2019-12-10 20:43:34
Check the completeness of given binary tree | Set 1 – Using Node Count2019-12-08 12:36:18
Number of Islands using BFS2019-12-06 20:25:30
Find all the Armstrong numbers in the given range2019-12-04 21:48:33
Check if the given binary tree is Full or not.2019-12-02 14:56:32
Check if given undirected graph is connected or not2019-11-30 14:44:26
Check if Graph is Bipartite – Adjacency List using Depth-First Search(DFS)2019-11-28 15:07:24
Print boundary of given matrix/2D array.2019-11-26 21:11:14
Depth-First Search (DFS) in 2D Matrix/2D-Array – Iterative Solution2019-11-24 20:52:46
Longest substring with at most K unique characters2019-11-22 21:22:47
Collatz Conjecture – Maximum Steps takes to transform (1, N) to 1.2019-11-20 21:17:01
Given Graph – Remove a vertex and all edges connect to the vertex2019-11-18 14:37:51
Print Stack in reverse order.2019-11-16 21:36:18
Sort a given stack – Using Recursion2019-11-14 21:10:27
Given an array, Print sum of all subsets2019-11-12 20:59:23
Determine the given routing number belong to which bank2019-11-10 15:41:50
Check if interval is covered in given coordinates2019-11-08 20:48:40
Lexicographically previous permutation With One swap2019-11-06 23:01:11
Find all unique combinations of exact K numbers (from 1 to 9 ) with sum to N2019-11-04 21:27:11
Number’s Complement – 2 Approaches2019-11-02 20:56:52
Print all subsets of an array with a sum equal to zero2019-10-30 23:31:12
Social Network Problem2019-10-28 22:48:55
Maximum number edges to make Acyclic Undirected/Directed Graph2019-10-27 00:33:10
Evaluation of Prefix Expressions (Polish Notation) | Set 22019-10-24 22:03:52
Hamming Distance between two given strings2019-10-22 15:30:12
Breadth-First Search in Disconnected Graph2019-10-20 22:02:37
ZigZag OR Diagonal traversal in 2d array/Matrix using queue2019-10-18 22:43:43
Check if Number is divisible by its digits2019-10-16 19:51:17
Check if the given number is Armstrong number or not2019-10-14 23:17:43
Evaluation of Prefix Expressions (Polish Notation) | Set 12019-10-12 16:46:38
Minimum Boats Required to rescue people2019-10-10 21:36:39
Number of Islands2019-10-08 21:50:42
Minimum No of operations required to convert a given number to 1 – Integer Replacement Problem.2019-10-06 16:00:02
Evaluation of Postfix Expressions (Polish Postfix notation) | Set 22019-10-04 23:35:14
Evaluation of Postfix Expressions (Polish Postfix notation) | Set 12019-10-03 00:44:00
Find all the numbers in the range which has prime set bits.2019-09-30 20:31:04
Check if Graph is Bipartite – Adjacency Matrix using Depth-First Search(DFS)2019-09-28 23:25:58
Check if Arithmetic Expression contains duplicate parenthesis2019-09-26 21:08:50
Introduction to Bipartite Graphs OR Bigraphs2019-09-25 20:54:08
Reverse the Directed Graph2019-09-22 21:50:05
Round Price Problem2019-09-20 22:21:46
Smallest Number after Removing K digits2019-09-18 21:33:04
Find Third Smallest elements in a given array2019-09-16 22:08:13
Determine the order of Tests when tests have dependencies on each other2019-09-14 23:57:36
Implement Graph Using Map – Java2019-09-12 20:30:54
Find the maximum number present in a String2019-09-10 20:01:59
Count number of subgraphs in a given graph2019-09-08 20:18:57
Reverse a Stack using recursion – In Place (Without using extra memory)2019-09-06 22:38:40
Check if given an edge is a bridge in the graph2019-09-04 20:59:33
Convert Prefix to Postfix Expression2019-09-02 23:01:26
Convert Roman Number to Integer2019-08-31 01:35:12
Sort a given stack – Using Temporary Stack2019-08-30 19:49:53
Convert Postfix to Prefix Expression2019-08-28 20:59:02
K-Means Algorithm2019-08-24 22:40:20
Convert Integer to Roman2019-08-24 22:16:44
String to Integer (AtoI – ASCII to Integer) – Recursive Solution2019-08-22 23:40:21
Grouping of Anagrams2019-08-20 23:01:05
Print Processes and its messages from a given log file2019-08-18 23:49:12
Linear Search vs Binary Search2019-08-16 23:52:54
Count the number of nodes in a given binary tree2019-08-14 22:40:21
Sieve of Eratosthenes – Find all Prime Numbers less than equal to N | Set 22019-08-12 22:56:32
Longest contiguous character in a given String – O(N) Solution2019-08-10 23:42:43
Convert Postfix to Infix Expression2019-08-08 23:27:35
Collatz Conjecture – Steps to transform Number to 12019-08-06 23:48:10
String to Integer (AtoI – ASCII to Integer)2019-08-04 01:07:26
Find all Prime Numbers less than equal to N | Set 12019-07-28 00:42:00
Longest substring with at most two unique characters2019-07-24 00:14:11
Monotone Increasing Digits2019-07-15 23:33:05
Convert Prefix to Infix Expression2019-06-22 16:46:07
Convert Infix to Prefix Expression2019-06-12 23:49:19
Find third largest element in a given array2019-05-29 20:21:18
Find duplicates Characters in the given String2019-05-21 20:32:57
Max Flow Problem – Ford-Fulkerson Algorithm2019-05-16 22:05:48
Sum of all Unique elements in a given array2019-05-07 21:13:04
Java program to find the largest element in array2019-05-03 00:09:03
Convert Infix to Postfix Expression2019-04-23 23:28:26
Find three smallest elements in a given array2019-04-16 00:07:24
Evaluation of Infix expressions2019-04-09 00:18:00
Stack Java Class – Explained2019-04-03 21:59:05
Least Recently Used (LRU) Cache – Using LinkedHashSet and Deque | Set 22019-04-01 21:59:32
Merge K sorted Linked List – Using Priority Queue2019-03-26 21:11:02
Infix, Postfix and Prefix Notations/Expressions2019-03-24 23:20:58
Count Set bits in a given Number2019-03-20 23:32:49
Check if array contains all unique or distinct numbers.2019-03-16 23:47:03
Product of all Unique elements in a given array.2019-03-03 22:36:36
Valid Multiple Parentheses2019-02-22 00:34:03
Reverse a given number – Java Code2019-02-17 23:13:30
Check if given number is perfect square – O(√N) Solution2019-02-09 13:48:09
Least Recently Used (LRU) Cache – Using HashMap and Doubly Linked List | Set 12019-02-05 22:59:48
Find first three largest elements in a given array2019-02-03 01:00:24
Selection Sort – Java Implementation2019-01-29 22:46:26
Print Number with its Sign in Java2019-01-28 00:55:46
Find the nearest building which has bike | Find nearest specific vertex from source in a graph.2019-01-26 23:13:34
Valid Brackets – Part 2 | Stack Method2019-01-24 23:02:32
Find the roots of Quadratic Equation – Java Program2019-01-23 20:52:50
Given two strings validate the output string2019-01-21 20:33:39
Generate all the strings of length n from 0 to k-1.2019-01-13 22:53:11
Find two smallest elements in a given array2019-01-05 23:41:24
Front and Back Search in an Array2018-12-30 01:09:19
Print all Unique elements in a given array2018-12-19 01:50:07
Multiply with power of 2 without using pow() or * operator2018-12-16 21:16:20
Find Number of reverse pairs in an array2018-12-15 14:10:38
Find first two largest elements in a given array2018-12-13 00:04:40
Calculate Logn base r – Java Implementation2018-12-11 01:00:54
Max Flow Problem – Introduction2018-12-09 20:35:40
Dijkstra Algorithm Implementation – TreeSet and Pair Class2018-11-21 15:10:26
Java Program to find Sum the elements of an Array2018-11-21 14:33:54
Insertion Sort – Java Implementation2018-11-19 21:59:01
Find Largest and Smallest word in a given String2018-11-03 23:18:30
Check if Given Number is power of 2.2018-10-27 18:26:37
Rotate the given array in cycles2018-09-21 18:22:28
Heap Sort – Java Implementation2018-09-11 21:21:41
Print First n numbers in Fibonacci Series2018-09-05 20:00:55
Find the Area and Perimeter of Rectangle – Java Program2018-09-02 00:01:41
Find no of reverse pairs in an array which is sorted in two parts in O(N)2018-08-26 21:03:09
Reverse the given String using Stack2018-08-22 22:10:50
Stack Data Structure – Introduction and Implementation2018-08-21 00:03:08
Dijkstra’s – Shortest Path Algorithm (SPT) – Adjacency List and Priority Queue – Java Implementation2018-08-17 22:46:01
Bubble Sort and Optimized Bubble Sort- Java Implementation2018-08-15 22:01:39
Find the Area of Triangle using base and height – Java Program2018-08-12 19:43:10
Get the Sum of Digits in a number till it become a single digit2018-08-08 23:49:57
Calculate Log2n without using built-in function2018-08-05 13:09:27
Check if given number is Prime – O(√N) Solution – Java Program2018-08-04 12:30:15
Print First N Prime Numbers – Java Code2018-08-02 22:05:53
Print My IP Address – Java Code2018-07-31 23:04:52
Find the Circumference of a Circle – Java Program2018-07-30 22:51:28
Check if two Strings are equal without using built-in function – Java2018-07-30 22:36:52
Remove Vowels from a given String2018-07-29 22:45:21
Linear Search Algorithm2018-07-28 21:07:29
Dijkstra’s – Shortest Path Algorithm (SPT) – Adjacency List and Min Heap – Java Implementation2018-07-25 21:38:54
Floyd’s Triangle – Java Implementation2018-07-24 23:31:44
Print Numbers from 1 to N without using loop2018-07-17 21:23:15
Swap two numbers using Bitwise XOR Operator2018-07-16 00:01:20
Java Program to determine if Given Year is Leap Year2018-07-13 21:00:32
Find number of Distinct Permutations of a String2018-07-10 20:09:56
Find the Area of a Circle – Java Program2018-07-08 00:52:58
Dijkstra’s – Shortest Path Algorithm (SPT) – Adjacency Matrix – Java Implementation2018-07-05 21:32:16
Fizz Buzz Challenge – Java Implementation2018-07-02 20:32:18
Divide with power of 2 without using pow() or / operator2018-06-29 21:50:20
Maximum Difference between two elements in array – Largest Gap Problem2018-06-27 23:26:53
Minimum number of guesses needed to find a specific number2018-06-25 00:24:15
Left Shift (<<) and Right Shift (>>) Operators2018-06-22 21:31:05
Dijkstra’s – Shortest Path Algorithm (SPT)2018-06-20 11:08:44
Replace all vowels with next consonant in a given string2018-06-18 00:08:11
Find the Area of a Triangle Using coordinates2018-06-16 20:00:23
Java Program to find if Triangle can be formed using given 3 sides2018-06-16 14:08:18
Convert Number to base 3 String Representation2018-06-16 13:59:13
Find the Area of a Triangle Given Three Sides – Heron’s Formula2018-06-09 13:29:49
Find Factorial of a given Number2018-06-09 12:39:24
Reverse a String using Recursion2018-06-09 12:10:26
Find Sum of all Digits of a Number2018-06-09 12:04:31
Print maximum occurring character in a String2018-06-09 00:37:38
Kruskal’s Algorithm – Minimum Spanning Tree (MST) – Complete Java Implementation2018-05-29 21:03:52
Introduction to Minimum Spanning Tree (MST)2018-05-17 00:04:11
Prim’s – Minimum Spanning Tree (MST) |using Adjacency List and Priority Queue without decrease key in O(ElogV)2018-05-15 20:19:52
Prim’s – Minimum Spanning Tree (MST) |using Adjacency List and Priority Queue with decrease key2018-05-13 15:56:05
Prim’s – Minimum Spanning Tree (MST) |using Adjacency List and Min Heap2018-05-07 19:47:49
Prim’s – Minimum Spanning Tree (MST) |using Adjacency Matrix2018-04-25 22:29:57
Prim’s Algorithm – Minimum Spanning Tree (MST)2018-04-21 21:40:54
Graph – Find Cycle in Undirected Graph using Disjoint Set (Union-Find)2018-04-15 13:23:01
Disjoint Set | Union-Find Algorithm – Union by rank and path compression2018-04-12 00:28:01
Disjoint Set Data Structure – Union Find Algorithm2018-04-07 23:27:03
Graph – Count all paths between source and destination2018-04-05 21:07:39
Graph – Find Number of non reachable vertices from a given vertex2018-04-02 20:19:14
Graph – Detect Cycle in a Directed Graph using colors2018-03-29 22:21:43
Graph – Detect Cycle in an Undirected Graph using DFS2018-03-26 23:17:41
Graph – Detect Cycle in a Directed Graph2018-03-21 21:54:43
Graph – Software Installation Problem2018-03-18 19:54:38
Snake and Ladder Problem2018-03-14 21:14:11
Weighted Graph Implementation – JAVA2018-03-13 22:23:16
Graph – Depth First Search in Disconnected Graph2018-03-11 13:43:04
Topological Sort2018-03-06 22:16:05
Graph – Depth First Search using Recursion2018-03-04 10:13:52
Graph Implementation – Adjacency Matrix | Set 32018-03-01 22:51:52
Java Pair Class2018-02-25 20:43:10
Graph Implementation – Adjacency List – Better| Set 22018-02-22 22:30:55
Minimum Copy Paste Operations2018-02-17 18:39:55
Count and print all Subarrays with product less than K in O(n)2018-02-12 23:10:46
Sliding Window Algorithm (Track the maximum of each subarray of size k)2018-02-10 18:38:00
Deque Implementation – Java2018-02-08 22:29:57
Print all sub sequences of a given String2018-02-05 22:23:27
Graph – Print all paths between source and destination2018-02-04 13:48:30
Graph – Depth First Traversal2018-02-01 22:19:03
Print all sub sequences of a given array2018-01-28 22:34:36
Print all substrings of a given string2018-01-26 00:08:36
Sum of all sub arrays in O(n) Time2018-01-22 18:09:42
Print all subarrays of a given array2018-01-19 17:47:19
Text Justification Problem (OR Word Wrap Problem)2018-01-16 17:37:39
Dynamic Programming – Egg Dropping Problem2018-01-13 22:24:22
Nuts & Bolts Problem (Lock & Key problem)2018-01-10 20:29:28
Divide and Conquer – Rearrange array elements in special order2018-01-05 20:18:16
Dynamic programming – Printer Problem2018-01-01 12:57:02
Remove Duplicates from a string2017-12-28 19:12:11
Find median of two sorted arrays of same size2017-12-23 14:01:30
Dynamic programming – Minimum Jumps to reach to end2017-12-17 13:42:17
Dynamic programming – Remove Boxes Problem2017-12-03 14:02:46
Find two non-repeating numbers in an array in O(n) time and O(1) space2017-10-29 09:24:47
Number of bit to be flipped to convert one number to another.2017-09-14 20:51:42
Separate even and odd integers in a given array2017-09-12 22:20:38
Find three elements in an array that sum to a zero.2017-09-11 22:10:00
All elements appears thrice and one element appears once. Find that element in O(n) time and O(1) space2017-09-07 19:56:04
Separate 0’s and 1’s in a given array2017-09-05 22:14:03
Find local minimum or local maximum in O(1).2017-09-04 14:27:54
Find three elements in an array that sum to a given value2017-09-03 22:09:56
Majority Element- Boyer–Moore majority vote algorithm2017-09-01 19:31:15
Majority Element – Part 12017-09-01 19:23:38
Find the local minima in a given array2017-09-01 19:15:53
Check whether the given number is a perfect square2017-08-26 23:15:50
Check if array is sorted using recursion2017-08-26 23:07:00
Find the Index from which 0 starts2017-08-26 23:01:16
Find the increasing OR decreasing point in an array2017-08-26 22:51:47
Find the only element in array which appears only once2017-08-26 22:43:36
Algorithm to calculate power(k,n).2017-08-26 22:35:13
Find remainder without using modulo operator2017-08-26 22:27:31
Swap two numbers without using extra variable2017-08-26 22:21:01
Number of 1’s in bit representation of a number2017-08-26 17:23:17
Stock Single Sell Problem – O(n) Solution2017-08-26 17:12:14
Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer2017-08-26 16:59:09
Maximum difference between two elements where larger element appears after the smaller element2017-07-30 16:24:30
Find the right most unset bit OR zero bit of a number2017-07-30 16:16:12
Find the two repeating elements in a given array | 6 Approaches2017-07-24 19:07:06
Find the right most set bit of a number2017-07-23 14:39:04
Find two elements whose sum is closest to zero2017-07-09 18:50:31
Find the element which appears maximum number of times in the array.2017-06-26 20:06:29
Find duplicates in an given array in O(n) time and O(1) extra space.2017-06-18 12:08:44
Find the last non repeating character in a given string.2017-06-11 19:21:28
Find the last repeating character in a given string.2017-05-29 20:34:49
Find the first non repeating character in a given string2017-05-27 15:08:59
Find the first repeating character in a given string2017-03-08 00:09:32
k-Nearest Neighbors2016-12-30 00:01:34
Find longest Snake sequence in a given matrix2016-08-08 00:24:22
Dynamic Programming – Count all paths in 2D Matrix with Obstructions in it2016-06-20 19:37:31
Dynamic Programming – Count all paths from top left to bottom right of a mXn matrix2016-06-19 10:29:43
Reverse the given Array without using built in function2016-06-19 10:17:23
Print All Diagonals of a given matrix2016-06-17 22:55:55
Dynamic Programming – Edit Distance Problem2016-05-14 20:11:10
Dynamic Programming – Coin In a Line Game Problem2016-05-08 18:08:55
Dynamic Programming – Box Stacking Problem2016-04-17 17:23:51
Dynamic Programming – Split the String into Minimum number of Palindromes.2016-04-10 12:20:39
Dynamic Programming – Highway Billboard Problem2016-04-05 14:20:47
Dynamic Programming – Maximum Subarray Problem2016-04-03 19:00:09
Kadane’s Algorithm – Maximum Subarray Problem2016-03-31 01:18:59
Convert Binary Tree into Threaded Binary Tree2016-03-24 18:55:05
Double Threaded Binary Tree Complete Implementation2016-03-21 20:53:09
Single Threaded Binary Tree Complete Implementation2016-03-19 16:56:28
Introduction to Threaded Binary Tree2016-03-19 16:33:38
Implement Stack Using Linked List2016-03-19 13:18:13
Doubly Linked List Complete Implementation2016-03-18 20:34:04
Circular Linked List Complete Implementation2016-03-15 23:18:33
Swap Nodes in pairs in a Linked List by changing links2016-03-13 20:09:38
Convert BST to Greater Sum Tree2016-02-27 20:45:26
Shortest Range in K-sorted Lists2016-02-19 22:54:24
Reverse Alternative ‘k’ nodes in a Linked List.2016-02-18 19:25:06
Reverse a Linked List in groups of given size ‘K’2016-01-03 20:47:34
Generate Maximum revenue by selling K tickets from N windows2016-01-03 20:22:26
Get the Sum of all left leaves in a Binary tree2015-12-06 11:44:36
Convert binary tree to its Sum tree2015-12-06 11:32:11
Binary Tree-Postorder Traversal – Non Recursive Approach2015-12-05 14:57:45
Binary Tree – Preorder Traversal – Non Recursive Approach2015-12-05 12:33:53
Binary Tree-Inorder Traversal – Non Recursive Approach2015-12-04 23:59:57
Delete the Binary Tree2015-12-04 23:25:34
Search the Element in a binary tree – With and Without Recursion2015-12-04 23:10:45
Tree Traversals2015-11-08 13:01:11
Find the Size of a Binary Tree without Recursion2015-11-08 12:33:19
Dynamic Programming — Longest Palindromic Subsequence2015-08-04 22:15:53
Dynamic Programming – Maximum Product Cutting Problem.2015-07-11 10:16:50
Dynamic Programming – Minimum Numbers are Required Whose Square Sum is Equal To a Given Number2015-07-03 21:35:20
Dynamic Programming – Longest Common Substring2015-06-29 21:29:51
Dynamic Programming – Longest Common Subsequence2015-06-28 11:43:44
Dynamic Programming – Rod Cutting Problem2015-06-27 17:59:36
Dynamic Programming – Coin Change Problem2015-06-27 15:06:04
Dynamic Programming – Minimum Cost Path Problem2015-06-14 17:51:12
All N Length Strings from Given String of Length K2015-06-10 21:40:01
Generate Well Ordered Passwords of a Given Length K2015-06-10 21:34:53
Print All N Length Strings from Given Number K2015-06-10 21:19:49
Print All Possible Subsets with Sum equal to a given Number2015-06-08 20:56:00
Dynamic Programming – Maximum size square sub-matrix with all 1s2015-05-10 13:47:45
Dynamic Programming – Subset Sum Problem2015-05-10 13:34:32
The Word Break Problem2015-05-10 13:15:51
Dynamic Programming – Longest Increasing Subsequence2015-05-10 02:14:14
Backtracking – Knight’s Tour Problem2015-05-10 01:28:37
Backtracking – Search a Word In a Matrix2015-05-10 01:09:13
Backtracking – N Queens Problem – Better Solution2015-05-10 00:55:54
Backtracking – N Queens Problem2015-05-10 00:43:48
Find the Kth Smallest/Largest Element in an Array2015-05-10 00:31:22
Priority Queue in Data Structure2015-05-10 00:21:29
Find the Second Largest Element in an Array2015-05-09 23:52:38
Breadth-First Search/Traversal in a Graph.2015-05-09 23:44:09
Breadth-First Search/Traversal in a Binary Tree2015-05-09 23:16:32
Sort Names by their Last Names.2015-05-08 18:45:42
Backtracking – Rat In A Maze Puzzle2015-04-13 15:03:35
Backtracking – SUDOKU Solver2015-03-16 20:24:30
Introduction To Backtracking Programming2015-03-16 20:13:31
Dynamic Programming – Stairs Climbing Puzzle2015-03-16 20:04:44
Dynamic Programming – Minimum Coin Change Problem2015-03-16 19:57:27
Introduction To Dynamic Programming – Fibonacci Series2015-03-16 19:44:12
Merge K Sorted Arrays2015-03-14 15:33:24
Find the Deepest Left Node in a Binary Tree.2015-03-14 15:24:00
Find a Number occurring odd number of times in a Given array2015-03-14 15:11:50
Rearrange the Array of Given Range N, such that A[i]=i2015-03-14 15:06:50
Find a Missing Number From a Sequence of Consecutive Numbers | XOR Method2015-03-14 14:44:19
Find the Max element in a Given Binary Tree2015-03-14 14:40:48
Populate Next Siblings Pointers in a Given Binary Tree OR Populate Next Right Pointers in Each Node2015-03-14 14:36:20
Check If One Binary is Mirror Tree of another Binary Tree.2015-03-14 14:21:10
Print All Paths From Root In a Binary Tree Whose Sum is Equal to a Given Number2015-03-14 14:14:08
Diameter Of a Binary Tree2015-03-14 14:08:57
Reverse Level Order Traversal2015-03-14 03:02:16
Find the Deepest Node in a Binary Tree.2015-03-14 02:15:48
Find the Height of a tree without Recursion2015-03-14 02:11:36
Print All The Full Nodes in a Binary Tree2015-03-14 02:02:33
Binary Min-Max Heap Implementation2015-02-22 17:21:28
Magic Index – Find Index In Sorted Array Such That A[i] = i.2015-02-22 17:06:00
Find numbers which are palindrome in both their decimal and octal Representations2015-02-22 16:02:07
Find All the Well Ordered Permutations of a Given String.2015-02-22 14:35:09
Find Increasing Triplet Sub-sequence2015-02-22 14:19:19
Construct a Special Triangle from a Given Array2015-02-22 14:10:01
Colorful Numbers2015-02-22 00:14:01
Print All the Subsets of a Given Set (Power Set)2015-02-21 23:59:01
Goldbach’s Conjecture2015-02-21 23:50:23
Convert Decimal into Irreducible Fraction2015-02-21 00:21:16
Clock Angle Problem2015-02-20 19:28:47
Print All Combinations of subset of size K from Given Array2015-02-20 19:07:29
Track the Maximum Element in a Stack.2015-02-16 16:24:07
Print All Possible Valid Combinations Of Parenthesis of Given ‘N’2015-02-05 14:14:38
Graph Representation – Adjacency Matrix and Adjacency List2015-02-02 17:38:37
Counting Sort2015-02-02 16:21:13
Towers Of Hanoi2015-02-02 16:15:09
Generate All Strings of n bits.2015-02-01 15:57:18
Find The Missing Duplicate in a Given Array.2015-02-01 15:40:25
Sort 3 Integers without using if condition OR use only Max() function.2015-02-01 15:30:49
Euclidean algorithm – Greatest Common Divisor(GCD)2015-01-31 23:46:08
Implement Queue Using Stacks2015-01-31 23:38:08
Alternate Splitting of a given Linked List2015-01-31 23:03:46
Reverse The Doubly Linked List2015-01-31 21:48:00
Swap Kth Node from the front with the Kth Node from the End2015-01-31 21:25:09
Print the Bottom View of the Binary Tree.2015-01-30 03:38:05
Delete X Nodes After Y Nodes In a Linked List2015-01-29 13:11:27
Merge Sort in a Linked list2015-01-29 12:55:27
Merge a Linked list into another Linked List at Alternate Positions.2015-01-05 20:22:52
AVL Tree – Insertion2014-12-30 23:10:35
Construct a binary tree from given Inorder and Level Order Traversal2014-12-30 21:46:58
Construct Binary Search Tree from a given Preorder Traversal Using Stack (Without Recursion)2014-12-30 05:55:03
Construct Binary Search Tree from a given Preorder Traversal using Recursion2014-12-30 05:45:40
Print The Top View of a Binary Tree2014-12-30 05:29:07
Construct a Binary Tree from Given Inorder and Depth-First-Search.2014-12-30 05:16:11
Depth First Search/Traversal in Binary Tree2014-12-30 05:03:06
Inorder Predecessor and Successor in Binary Search Tree2014-12-29 22:08:55
Check if Array Contains All Elements Of Some Given Range2014-12-29 20:44:38
Check if Array is Consecutive Integers2014-12-29 20:37:11
Find the subarray with sum to a Given Value.2014-12-29 20:28:35
In an Array, find the Smallest Subarray with Sum Greater than the Given Value2014-12-29 20:18:37
Rearrange Positive and Negative Elements at Alternate Positions in an Array In O(1) Extra Space2014-12-28 06:21:34
Find intersection between Two Sorted Arrays.2014-12-28 06:09:47
Find Kth Smallest or Largest element in an Array.2014-12-28 06:02:44
Given an array arrA[], find the maximum j – i such that arr[j] > arr[i].2014-12-28 05:53:26
Find All Elements in an Array which appears more than N/K times, N is Array Size and k is a Number.2014-12-28 03:15:17
Search an Element in a Rotated Sorted Array2014-12-28 02:53:10
Print All The Nodes Which are X distance from the Given Node2014-12-08 23:37:27
Print All The Nodes Which are X distance from the Leaf Nodes2014-12-08 23:24:13
Print All The Nodes Which are X distance from the Root2014-12-08 23:16:50
Find the Distance between Two Nodes of a Binary Tree.2014-12-08 23:05:02
Find The Distance From Root To Given Node of a Binary Tree.2014-12-08 22:55:07
Construct a binary tree from given Inorder and Postorder Traversal2014-12-08 22:44:15
Print the Vertical Sum in binary Tree .2014-12-08 22:19:30
Print the Binary Tree in Vertical Order Path.2014-12-08 22:11:03
Lowest Common Ancestor in a Binary Tree (Not Binary Search Tree).2014-11-18 08:52:45
Lowest Common Ancestor in a Binary Search Tree.2014-11-18 08:28:54
Make a Binary Tree from Given Inorder and Preorder Traveral.2014-11-18 08:06:33
Given a binary tree, find out the maximum sum of value from root to each leaf.2014-11-18 07:50:13
Reverse Alternate levels of a given Binary Tree.2014-11-18 07:28:37
Given a Sorted Singly Linked List Array, Convert it into a Balanced Binary search Tree.2014-11-18 07:03:24
Given a binary tree, Convert it into its Mirror Tree2014-11-18 03:46:41
Given a binary tree, Print All the Nodes that don’t have Siblings.2014-11-18 02:46:53
Convert a Sorted Doubly Linked List to Balanced BST.2014-11-18 02:30:44
Given a binary tree, Find the Maximum Path Sum between Any Two Leaves2014-11-18 01:00:34
Print Left View of a given binary tree2014-11-18 00:46:23
Print Right View of a given binary tree2014-11-17 23:33:25
In a Binary Tree, Check if Two nodes has the same parent or are siblings2014-11-17 23:12:16
In a Binary Tree, Check if two nodes are Cousins2014-11-17 22:46:45
Check if Two BST’s are Identical2014-11-17 21:45:02
Print Paths from root to all leaf nodes in a binary tree.2014-11-17 21:14:09
Print All The Permutations Of a String2014-11-14 22:06:29
Sort an Given Array in the order defined by another array2014-11-14 21:02:52
Sort an Array – odd numbers appear first in ascending order followed by the even numbers in descending order.2014-11-11 08:08:33
Print All Nodes Between Two Given Levels2014-11-11 07:54:34
Find the maximum width of a binary tree2014-11-11 05:23:43
Find the number of occurrences of a number in a given sorted array.2014-11-11 03:14:09
Find all common numbers in given three sorted arrays.2014-11-11 03:05:11
Level Order Traversal in Zig Zag pattern OR Print in Spiral Pattern2014-11-10 20:04:05
Find the first repeated element in an array by its index2014-11-10 18:58:58
Minimum number that cannot be formed by any subset of an array2014-11-10 18:21:30
Determine whether given binary tree is binary search tree(BST) or not2014-09-27 20:58:54
Find the Size of the Binary Tree2014-09-27 19:12:28
Given two binary trees, check if one binary tree is a subtree of another2014-09-27 18:18:22
Print a path from Root to Node in Binary Tree2014-09-27 18:04:50
Inorder Successor in Binary Search Tree without Using Parent link2014-09-27 16:46:09
Inorder Successor in Binary Search Tree Using Parent link2014-09-27 16:46:01
Inorder Successor in Binary Tree2014-09-27 16:45:50
Sorted Array to Binary Search Tree of Minimal Height2014-09-27 15:51:19
In a Binary Tree, Create Linked Lists of all the nodes at each depth.2014-09-22 21:38:14
Level Order Traversal, Print each level in separate line.2014-09-21 08:03:34
Find whether if a Given Binary Tree is Balanced?2014-09-21 01:16:54
Get the Height of a Node in a Binary Tree2014-09-20 17:05:05
Find the Maximum Depth OR Height of a Binary Tree2014-09-19 15:53:16
Add two numbers represented by a linked list, Numbers are Stored in FORWARD order2014-09-16 22:59:40
Add two numbers represented by a linked list, Numbers are Stored in REVERSE order2014-09-16 22:28:49
Reverse the binary representation of a number.2014-09-16 20:32:30
Binary Search Tree (BST) Complete Implementation.2014-09-16 00:38:04
Reverse a Linked List – Part 22014-09-14 03:13:55
Swap Every Kth Node in a LinkedList2014-09-14 03:02:40
Delete a Node in the Middle of a linked list, Given only access to that Node2014-09-12 17:16:37
Find the n’th Node from the end of a given Linked List2014-09-12 06:40:00
Remove Duplicates from an Unsorted Linked list2014-09-11 17:06:30
Check if one string is Rotation of another string2014-09-09 23:29:04
String Compression using count of repeated characters – Run Length Encoding2014-09-09 02:49:24
Replace all spaces in a String with ‘%20’2014-09-08 05:26:30
Find Whether Two Strings are Permutation of each other2014-09-08 05:19:13
Find Intersection Point in Two Linked List2014-09-06 17:41:44
Find the Loop in a Linked list, find its length and Break the Loop2014-09-05 21:49:36
Reverse a Linked List2014-08-28 16:54:29
Count All Paths from Top left to bottom right in Two Dimensional Array including Diagonal Paths2014-08-25 04:11:48
Print All Paths from Top left to bottom right in Two Dimensional Array2014-08-13 14:43:45
Merge or Combine Two Sorted Linked Lists2014-08-12 14:58:31
Singly Linked List Implementation2014-08-12 14:34:27
Rearrange Positive and Negative Numbers of Array On Each Side in O(nlogn)2014-08-04 17:50:28
Find The Longest Sequence Of Prefix Shared By All The Words In A String2014-08-04 17:37:31
Print All Elements of Two Dimensional Array in Spiral2014-08-04 17:11:31
Find a pair of numbers from an array whose sum equals k2014-08-04 02:01:38
Check If String has All Unique Characters2014-08-03 05:49:14
Quick Sort Implementation2014-08-03 02:22:30
Valid or Well Formed Parentheses | Part – 12014-07-23 19:08:54
Find an Element in 2 dimensional sorted array2014-07-20 22:27:52
Find Whether Given String is palindrome or Not.2014-07-20 22:19:24
Find a peak element in a Given Array2014-07-20 22:12:23
Find two Missing Numbers in a Sequence of Consecutive Numbers2014-07-20 22:05:30
Find a Missing Number From a Sequence of Consecutive Numbers2014-07-20 22:00:05
Hash Table Implementation2014-07-20 21:54:06
Merge Sort – Updated – Most Efficient ways to Implement2014-07-20 21:41:14
Binary Search2014-07-20 15:35:10