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schrodinger_19
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768
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310
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899 points
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100 Point
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BASIC (35)
EASY (143)
MEDIUM (116)
HARD (16)
- Reverse a linked list
- Node at a given index in linked list
- Delete in a Doubly Linked List
- Inorder Traversal
- Reverse a Doubly Linked List
- Check for BST
- K distance from root
- Maximum Width of Tree
- Delete without head pointer
- Height of Binary Tree
- Middle of a Linked List
- Left View of Binary Tree
- Find Transition Point
- Queue using two Stacks
- Stack using two queues
- Level Order in spiral form
- DFS of Graph
- Insert a node in a BST
- BFS of graph
- Identical Trees
- Root to leaf path sum
- Lowest Common Ancestor in a BST
- Binary Search
- Remove Duplicates Sorted Array
- Level Order Line by Line
- Remove duplicates in array
- Binary Tree to BST
- Third largest element
- Match specific pattern
- Josephus problem
- Longest Consecutive Subsequence
- Delete in a Singly Linked List
- Minimum distance in an Array
- Array Duplicates
- Special Stack
- Three way partitioning
- Level order traversal
- Inorder Successor in BST
- Operating an array
- Level of a Node in Binary Tree
- Max and min element in Binary Tree
- Sum of digits in factorial of a number
- Reverse Using Stack
- Symmetric Tree
- Count Pairs whose sum is equal to X
- Queue Reversal
- Reverse first K of a Queue
- Delete Mid of a Stack
- Rotate doubly Linked List
- Swap the objects
- Structs and Objects
- Learning Structs
- Java ArrayList Operation
- Reverse an Array
- Stack Operations
- Frequency in Queue
- Operations on PriorityQueue
- Get min at pop
- Deque Implementations
- Max and Second Max
- First Set Bit
- Digits In Factorial
- GP Term
- Primality Test
- Modular Inverse
- Swap odd and even bits
- Wave Array
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Sort by Absolute Difference
- Print adjacency list
- Rotate by 90 degree
- The Modified String
- Reverse Words
- Minimum indexed character
- Non Repeating Character
- Parenthesis Checker
- Minimum indexed character
- Minimum Cost of ropes
- N meetings in one room
- Count Digits in a Number
- Digital Root
- Power Set Using Recursion
- Count number of hops
- Reach a given score
- Check Equal Arrays
- Missing in Array
- Missing And Repeating
- Maximum Gap
- Pairs with certain difference
- Move All Zeroes to End
- Move all negative elements to end
- String Manipulation
- Minimum Distinct Ids
- Maximum Sum Bitonic Subsequence
- Convert a sentence into its equivalent mobile numeric keypad sequence
- Convert array into Zig-Zag fashion
- K-Pangrams
- Find the most frequent digit
- Modify the Array
- String's Count
- Substrings with same first and last characters
- Two sum -Pairs with 0 Sum
- Sum of f(a[i], a[j]) over all pairs in an array of n integers
- Three Great Candidates
- At Least K Occurrences
- Delete Array Elements
- Pair with given sum in a sorted array
- Print Bracket Number
- Easy string
- Minimum changes to make all substrings distinct
- Karatsuba Algorithm
- Minimum Operations
- Divisibility by 8
- Circle and Lattice Points
- Love For The Twins
- XOR of equal length binary numbers
- Reverse Bits
- Count digits in a factorial
- Maximum Product Cutting
- Minimum number of deletions to make a sorted sequence
- Count numbers
- Amicable Pair
- Minimum number of Coins
- Day of the week
- Maximize Toys
- Page Faults in LRU
- Recamans sequence
- Penalty Shooters
- Count ways to express N as the sum of 1,3 and 4
- Trailing zeroes in factorial
- Form a number divisible by 3 using array digits
- Least Prime Factor
- Euler Totient
- Triangular Number
- Recursive sequence
- Tom and Jerry
- Geek and his Tricky Series
- Collection of pens
- Overlapping rectangles
- Print Pattern
- Print Diagonally
- Count Linked List Nodes
- Size of Binary Tree
- Postorder Traversal
- Implement stack using array
- Replace all 0's with 5
- Preorder Traversal
- Sum Except First and Last
- Smallest divisible number
- Peak element
- Minimum element in BST
- Is Linked List Length Even?
- Stack designer
- Queue Push & Pop
- Who has the majority?
- Strongest Neighbour
- Array insert at index
- Array insert at end
- Absolute Value
- Convert Celsius To Fahrenheit
- Print 1 To N Without Loop
- Check if a string is Isogram or not
- Sum of Digits of a Number
- Power Using Recursion
- Fibonacci Using Recursion
- Addition Under Modulo
- Sum of all sub-sequences of a number
- Merge two strings
- Print first letter of every word in the string
- Good or Bad string
- Magical String[Duplicate Problem]
- GCD of Array
- Finding Dory
- Repetitive Addition Of Digits
- Rectangle Number
- Finding Position
- Longest Even Length Substring
- Rank of Matrix
- Rotate a Linked List
- Merge 2 sorted linked list in reverse order
- Detect Loop in linked list
- Merge Sort
- Bottom View of Binary Tree
- Intersection in Y Shaped Lists
- Heap Sort
- Merge two sorted linked lists
- Sum Tree
- Connect Nodes of Levels
- Delete a node from BST
- Directed Graph Cycle
- Undirected Graph Cycle
- LCA in Binary Tree
- Two Stacks in an Array
- Max sum path in two arrays
- Topological sort
- Get Min from Stack
- Gas Station
- Linked List to Binary Tree
- Check if subtree
- Remove loop in Linked List
- Dijkstra Algorithm
- Minimum Spanning Tree
- Interleaved Strings
- Multiply two strings
- Minimum Swaps to Sort
- Palindrome Linked List
- Merge two BST 's
- Find triplets with zero sum
- Sort a stack
- k-th Smallest in BST
- Ancestors in Binary Tree
- Pair Sum in BST
- Linked List that is Sorted Alternatingly
- Predecessor and Successor
- Count set bits
- Tower Of Hanoi
- Power Of Numbers
- Possible Words From Phone Digits
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Stock buy and sell
- Kadane's Algorithm
- Majority Element
- Count Inversions
- Indexes of Subarray Sum
- Case-specific Sorting of Strings
- Postfix Evaluation
- Stock span problem
- Next Greater Element
- Infix to Postfix
- Kth smallest element
- Fractional Knapsack
- Minimum Platforms
- Black and White
- Stickler Thief
- Egg Dropping Puzzle
- Optimal Strategy For A Game
- Minimum number of jumps
- Longest Increasing Subsequence
- Longest Common Subsequence
- Lucky Numbers
- Number of Unique Paths
- Equal Sum Partition
- Preorder to BST
- Shortest Common Supersequence
- Nth Catalan Number
- Maximize The Cut Segments
- Word Break
- Sort 0s, 1s and 2s
- Equal Sum
- Consecutive 1's not allowed
- Count of Subarrays
- Mr Modulo and Pairs
- Palindrome SubStrings
- Count the Reversals
- k largest elements
- Longest Palindrome in a String
- String formation from substring
- Number of pairs
- Find the number of subarrays having even sum
- Valid Substring
- Permutations of a String
- Subsequence matching
- Friends Pairing Problem
- Skip the work
- Largest prime factor
- Coin Change (Count Ways)
- Sequence of Sequence
- Sieve of Eratosthenes
- Gold Mine Problem
- Dice throw
- Dyck Path
- Longest subsequence-1
- nCr
- Maximum path sum in matrix
- Minimum steps to destination
- Longest Bitonic subsequence
- Count the number of ways to tile the floor of size n x m using 1 x m size tiles
- Prime Pair with Target Sum
- Card Rotation
- Choose and Swap
- Return two prime numbers
- Find Prime numbers in a range
- Prime Factors and their Powers
- Find the Safe Position
- Next Permutation
- Smaller on Left
- Longest Repeating Subsequence
- Decode the string
- Total Decoding Messages
- Largest square formed in a matrix
- Snake and Ladder Problem
- Linked List Group Reverse
- Reorder List
- Max rectangle
- Fixing Two nodes of a BST
- Max Path Sum 2 Special Nodes
- Histogram Max Rectangular Area
- Merge Without Extra Space
- Count Pairs in an Array
- Ugly Numbers
- Longest Prefix Suffix
- Edit Distance
- Minimum sum partition
- Next Happy Number
- Matrix Chain Multiplication
- Longest valid Parentheses
- Travelling Salesman Problem
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