Data Structure
Java
Python
HTML
Interview Preparation
- Tutorials
- Courses
- Tracks
ujjwalshrivastava2309
starstarstar
STREAK
75/1540
days
Longest streak/Global longest streak
Language Used
Java, C++, Python
Coding Score
984
Problem Solved
311
Contest Rating
1634
Campus Mantri
sakshamjain0464412 points
Contributor
412 points
Contributor
1 Point
Proficient
Proficient
100 Point
Scholar
Scholar
1k Point
Master
Master
10k Point
Ace
Ace
50k Point
4 submissions in current year
SCHOOL (0)
BASIC (11)
EASY (110)
MEDIUM (168)
HARD (22)
- Reverse a linked list
- Linked list of strings forms a palindrome
- Delete in a Doubly Linked List
- Inorder Traversal
- Reverse a Doubly Linked List
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Height of Binary Tree
- Balanced Tree Check
- Kth from End of Linked List
- Middle of a Linked List
- Left View of Binary Tree
- Delete Middle of Linked List
- Postorder Traversal
- Reverse Level Order Traversal
- DFS of Graph
- BFS of graph
- Identical Trees
- Root to leaf path sum
- Square Root
- Nodes without a Sibling
- Insertion at doubly linked list
- Toeplitz matrix
- Remove every k'th node
- Josephus problem
- Delete in a Singly Linked List
- Array Duplicates
- Special Stack
- Three way partitioning
- Intersection of Two Linked Lists
- Minimum element in BST
- Sum of leaf nodes in BST
- Symmetric Tree
- Count Pairs whose sum is equal to X
- Remove Half Nodes
- Closest Neighbour in BST
- Swap the array elements
- Xoring and Clearing
- Check K-th Bit
- Power of 2
- Array Leaders
- Parenthesis Checker
- N meetings in one room
- Reach a given score
- Count ways to N'th Stair
- Missing in Array
- Product array puzzle
- Max Value Permutation
- Missing And Repeating
- Count the elements
- Find Kth Rotation
- Sorted and Rotated Minimum
- Move All Zeroes to End
- String Duplicates Removal
- Sort Array II
- Single Number
- Alternate Positive Negative
- Remaining String
- Remove Duplicates
- Second Largest
- Number of occurrence
- K-Pangrams
- Does array represent Heap
- Find missing in second array
- Longest Common Prefix of Strings
- Two sum -Pairs with 0 Sum
- Segregate 0s and 1s
- Play With OR
- At Least K Occurrences
- Total count
- Print Bracket Number
- Extract the Number from the String
- Divisibility by 8
- Number of 1 Bits
- Find the Highest number
- Armstrong Numbers
- Reverse Bits
- Nth Fibonacci Number
- Prime Number
- Maximum Sum Problem
- Party of Couples
- Minimum number of Coins
- Recamans sequence
- Compare two fractions
- Recursive sequence
- Juggler Sequence
- Summed Matrix
- Row with Minimum 1s
- Coverage of all Zeros in a Binary Matrix
- Insert an Element at the Bottom of a Stack
- Fibonacci series up to Nth term
- All divisors of a Number
- Find XOR of numbers from L to R.
- Divisor Game
- Search in Linked List
- Remove duplicates from a sorted doubly linked list
- Unique Binary Tree Requirements
- Max Splits
- Lead Engineer
- Find Bots on Geeklandster
- Chocolate Distribution
- Equality
- Minimum Number of Elements
- Check for Consecutive
- Prefix Distinct
- Frequency of every Element
- Find Mode in BST
- Split an array into two equal Sum subarrays
- Geekland Tax Calculator
- Rotate a Linked List
- Sort a linked list of 0s, 1s and 2s
- Add Number Linked Lists
- Add 1 to a Linked List Number
- Detect Loop in linked list
- Check for BST
- Binary Tree from Inorder and Postorder
- Bottom View of Binary Tree
- Delete without head pointer
- Diameter of a Binary Tree
- Sum Tree
- Construct Binary Tree from Parent Array
- Tree Boundary Traversal
- Directed Graph Cycle
- Undirected Graph Cycle
- LCA in Binary Tree
- Lowest Common Ancestor in a BST
- The Celebrity Problem
- Topological sort
- Vertical Tree Traversal
- Find the number of islands
- Linked List to Binary Tree
- Validate an IP Address
- Dijkstra Algorithm
- Additive sequence
- Largest BST
- Palindrome Linked List
- Print matrix in diagonal pattern
- Rat in a Maze
- Bipartite Graph
- Merge two BST 's
- Sort a stack
- Top View of Binary Tree
- Level order traversal
- Peak element
- Merge Sort for Linked List
- Euler Circuit in an Undirected Graph
- Ancestors in Binary Tree
- Root to Leaf Paths
- Populate Inorder Successor for all nodes
- Linked List that is Sorted Alternatingly
- Arrange Consonants and Vowels
- Vertical sum
- Children Sum in a Binary Tree
- Diagonal sum in binary tree
- Find length of Loop
- Duplicate Subtrees
- Sum of nodes on the longest path
- ZigZag Tree Traversal
- Vertical Width of a Binary Tree
- Gray to Binary Conversion
- Maximum Index
- Kadane's Algorithm
- Two Repeated Elements
- Union of 2 Sorted Arrays
- Triplet Sum in Array
- Number of pairs
- Spirally traversing a matrix
- Distance of nearest cell having 1
- Next Greater Element
- Infix to Postfix
- Fractional Knapsack
- Job Sequencing Problem
- Minimum Platforms
- Target Sum Combinations
- Stickler Thief
- Ways to Reach the n'th Stair
- Optimal Strategy For A Game
- Sum of all substrings of a number
- Longest Increasing Subsequence
- Longest Common Subsequence
- 0 - 1 Knapsack Problem
- Allocate Minimum Pages
- Kth Smallest
- Rotten Oranges
- Maximize The Cut Segments
- Container With Most Water
- Closest Three Sum
- Word Break
- Prerequisite Tasks
- Paths to reach origin
- Sum of Middle elements of two sorted arrays
- Single Among Doubles in a Sorted
- Search in Rotated Sorted Array
- Count pairs Sum in matrices
- Form the Largest Number
- Row with max 1s
- Check if frequencies can be equal
- Form a palindrome
- Next Smaller Element
- Find the N-th character
- Longest Common Substring
- K-th element of two Arrays
- First and Last Occurrences
- Print N-bit binary numbers having more 1s than 0s
- Sum of Products
- Maximize dot product
- Coin Change (Count Ways)
- Perfect Sum Problem
- Smallest number
- Power Set
- Maximum path sum in matrix
- Minimum steps to destination
- Subset Sums
- Prime Pair with Target Sum
- Number of paths in a matrix with k coins
- Find nth root of m
- Game with String
- Maximum sum of hour glass
- Exit Point in a Matrix
- Longest alternating subsequence
- Rotate Each Row of Matrix K Times
- Segregate even and odd nodes in a Linked List
- Number of Rectangles in a Circle
- Largest square formed in a matrix
- Replace O's with X's
- Two odd Occuring
- Rohan's Love for Matrix
- Floyd Warshall
- Flood fill Algorithm
- Array to BST
- Largest subsquare surrounded by X
- Subset Sum Problem
- Bellman-Ford
- Subarrays with sum K
- Remove K Digits
- Number of Provinces
- Remove all occurences of duplicates in a linked list
- Course Schedule
- Overlapping Intervals
- Reverse a Stack
- Maximum product subset of an array
- Find shortest safe route in a matrix
- Number of Distinct Islands
- Number Of Enclaves
- Eventual Safe States
- City With the Smallest Number of Neighbors at a Threshold Distance
- Path With Minimum Effort
- Shortest Path in Undirected Graph
- Shortest path in Directed Acyclic Graph
- Koko Eating Bananas
- Search in Rotated Array 2
- Sum of subarray minimums
- Combination Sum III
- Aggressive Cows
- Check if there exists a subsequence with sum K
- Number of greater elements to the right
- Combination Sum Without Repetition
- Shortest Path in Weighted undirected graph
- Generate all binary strings
- Delete all occurrences of a given key in a doubly linked list
- Postfix to Infix Conversion
- Hands of Straights
- Minimum Absolute Difference In BST
- Non-overlapping Intervals
- Insert Interval
- Count Number of Nodes in a Binary Tree
- Find the first node of loop in linked list
- Number of Good Components
- Flatten BST to sorted list
- Last Fairy Standing
- Another Lucky String
- Minimize the Difference
- Pairs violating the BST property
- Kth common ancestor in BST
- Beautiful cities - I
- Coin Distribution
- Maximum Doublet XOR
- Serialize and deserialize a binary tree
- Distinct occurrences
- Alien Dictionary
- Merge Sort on Doubly Linked List
- Trapping Rain Water
- Word Ladder I
- Burning Tree
- Count Pairs in an Array
- Count Smaller elements
- Longest repeating and non-overlapping substring
- Edit Distance
- Minimum Points To Reach Destination
- Stock Buy and Sell – Max K Transactions Allowed
- Matrix Chain Multiplication
- Strictly Increasing Array
- Generalised Fibonacci numbers
- Possible Paths in a Tree
- Search Pattern (Rabin-Karp Algorithm)
- Word Ladder II
- Split Array Largest Sum
- Stock Buy and Sell – Max 2 Transactions Allowed
- Maximum Connected group