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nikhilchhipa9
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STREAK
28/1431
days
Longest streak/Global longest streak
Institution
National Institute of Technology, Tiruchirappalli (NIT Trichy)
107 RankInstitute Rank
Language Used
C++, Java, C
Coding Score
1777
Problem Solved
588
Contest Rating
1714
2334 points
Contributor
2334 points
Contributor
1 Point
Proficient
Proficient
100 Point
Scholar
Scholar
1k Point
Master
Master
10k Point
Ace
Ace
50k Point
195 submissions in current year
SCHOOL (2)
BASIC (78)
EASY (195)
MEDIUM (269)
HARD (44)
- 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
- Rearrange linked list in-place
- Quick Sort on Linked List
- Sorted insert for circular linked list
- Count BST nodes that lie in a given range
- Bottom View of Binary Tree
- Intersection in Y Shaped Lists
- Diameter of a Binary Tree
- Merge two sorted linked lists
- Add all greater values to every node in a BST
- Sum Tree
- Flattening a Linked List
- Tree Boundary Traversal
- Directed Graph Cycle
- Undirected Graph Cycle
- Absolute List Sorting
- Max sum path in two arrays
- The Celebrity Problem
- Largest subarray with 0 sum
- Topological sort
- Merge K sorted linked lists
- Find the number of islands
- Find kth element of spiral matrix
- Get Min from Stack
- Gas Station
- Wildcard Pattern Matching
- Kth element in Matrix
- Validate an IP Address
- Remove loop in Linked List
- Dijkstra Algorithm
- Minimum Spanning Tree
- Additive sequence
- Largest BST
- Sorted subsequence of size 3
- Implement Atoi
- Maximum Difference
- Palindrome Linked List
- Strongly Connected
- Print matrix in diagonal pattern
- Rat in a Maze Problem - I
- BST with Dead End
- Merge two BST 's
- Minimum four sum subsequence
- Count distinct elements in every window
- Root to leaf paths sum
- Bridge edge in a graph
- Find triplets with zero sum
- Duplicate Subtree
- Top View of Binary Tree
- k-th Smallest in BST
- Find Common Nodes in two BSTs
- Delete nodes greater than k
- Union of Two Linked Lists
- Euler Circuit in an Undirected Graph
- Pair Sum in BST
- Root to Leaf Paths
- XOR Linked List
- Counting elements in two arrays
- Linked List that is Sorted Alternatingly
- K Sum Paths
- Construct Tree from Inorder & Preorder
- Insert in Sorted way in a Sorted DLL
- Maximum path sum from any node
- Predecessor and Successor
- Children Sum in a Binary Tree
- Diagonal sum in binary tree
- Deletion and Reverse in Circular Linked List
- Duplicate Subtrees
- Sum of nodes on the longest path
- ZigZag Tree Traversal
- Ceil in BST
- Rotate and delete
- Maximum Index
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Count Inversions
- Two Repeated Elements
- Indexes of Subarray Sum
- Count the number of possible triangles
- Number of pairs
- Merge Without Extra Space
- Boolean Matrix
- Spirally traversing a matrix
- Subarray with 0 sum
- Subarray range with given sum
- Sort Elements by Decreasing Frequency
- Longest Consecutive Subsequence
- Case-specific Sorting of Strings
- Postfix Evaluation
- Stock span problem
- Next Greater Element
- Infix to Postfix
- K Sized Subarray Maximum
- Kth smallest element
- Activity Selection
- Fractional Knapsack
- Job Sequencing Problem
- Minimum Platforms
- M-Coloring Problem
- Minimum Jumps
- Stickler Thief
- Ways to Reach the n'th Stair
- Egg Dropping Puzzle
- Optimal Strategy For A Game
- Sum of all substrings of a number
- Longest Increasing Subsequence
- Longest Common Subsequence
- 0 - 1 Knapsack Problem
- Number of Unique Paths
- Allocate Minimum Pages
- Kth Smallest
- Implement Trie
- Shortest Common Supersequence
- Rotten Oranges
- Maximize The Cut Segments
- Container With Most Water
- Print Anagrams Together
- Rotate by 90 degree
- Word Break
- Generate Parentheses
- Word Search
- 4 Sum - All Quadruples
- Sort 0s, 1s and 2s
- Longest Span in two Binary Arrays
- Sum of Middle elements of two sorted arrays
- Consecutive 1's not allowed
- Split the Array
- Pythagorean Triplet
- Search in Rotated Sorted Array
- Form the Largest Number
- Add Binary Strings
- Sort the given array after applying the given equation
- Row with max 1s
- Max value after m range operation
- Check if frequencies can be equal
- Substrings with K Distinct
- Rotate a Matrix
- Longest Subarray with Sum K
- Find the N-th character
- Longest Common Substring
- Longest substring with distinct characters
- Longest Palindrome in a String
- Cut rope to maximise product
- K-th element of two Arrays
- Possible groups
- Longest Arithmetic Subsequence
- Triplets with Smaller Sum
- Rod Cutting
- K closest elements
- LCS of three strings
- First negative in every window of size k
- Equalize the Towers
- Minimum sum
- Not a subset sum
- Minimize the Heights II
- Minimum Deletions
- Print N-bit binary numbers having more 1s than 0s
- Permutations of a String
- Friends Pairing Problem
- Unique Number II
- Modified Game of Nim
- Minimum number of deletions and insertions
- Max Sum Increasing Subsequence
- Coin Change (Count Ways)
- Minimum steps to delete a string
- Mobile numeric keypad
- Gold Mine Problem
- Dice throw
- Perfect Sum Problem
- Trail of ones
- Count ways to N'th Stair(Order does not matter)
- Knapsack with Duplicate Items
- nCr
- Partition Equal Subset Sum
- Longest Bitonic subsequence
- Count digit groupings of a number
- Prime Pair with Target Sum
- Nth Natural Number
- Number of paths in a matrix with k coins
- Sum of Query II
- Game with String
- How Many X's?
- Longest alternating subsequence
- Decode the string
- Total Decoding Messages
- Check If two Line segments Intersect
- Segregate even and odd nodes in a Linked List
- Number of Rectangles in a Circle
- Integral Points Inside Triangle
- Transitive closure of a Graph
- Check Mirror in N-ary tree
- Count the paths
- Floyd Warshall
- Largest subsquare surrounded by X
- Police and Thieves
- Subset Sum Problem
- Search Pattern (Rabin-Karp Algorithm)
- All Palindromic Partitions
- Bellman-Ford
- Subarrays with sum K
- Coin Piles
- Substrings of length k with k-1 distinct elements
- Number of Provinces
- Find rectangle with corners as 1
- Shortest Prime Path
- Empty the String
- Course Schedule
- Overlapping Intervals
- Maximum product subset of an array
- K-th Largest Sum Contiguous Subarray
- Maximum Meetings in One Room
- Exactly one swap
- Find shortest safe route in a matrix
- Graph is Tree or Not
- Sort a k sorted doubly linked list
- Minimum Multiplications to reach End
- City With the Smallest Number of Neighbors at a Threshold Distance
- Number Of Islands
- Connecting the graph
- Shortest Path in Undirected Graph
- Shortest path in Directed Acyclic Graph
- Majority Element II
- Koko Eating Bananas
- Longest subarray with Atmost two distinct integers
- Sum of subarray minimum
- Frog Jump
- Minimal Cost
- Geek's Training
- Aggressive Cows
- Smallest Divisor
- Prefix to Infix Conversion
- Prefix to Postfix Conversion
- Minimum days to make M bouquets
- Delete all occurrences of a given key in a doubly linked list
- Postfix to Prefix Conversion
- Postfix to Infix Conversion
- Minimum Absolute Difference In BST
- Maximum Sum Combination
- Stickler Thief II
- Insert Interval
- Shortest Job first
- Print Longest Increasing Subsequence
- Partitions with Given Difference
- Index of the First Occurrence of pattern in a text
- Floor in BST
- Largest Divisible Subset
- Unique Paths in a Grid
- Remove the balls
- GSB Interview
- Pairs violating the BST property
- Kth common ancestor in BST
- Kth Missing Positive Number in a Sorted Array
- Count Subarrays with given XOR
- Set Matrix Zeroes
- Minimum cost to connect all houses in a city
- Find All Triplets with Zero Sum
- Split array in three equal sum subarrays
- Longest Subarray with Majority Greater than K
- Count all triplets with given sum in sorted array
- Implement Pow
- Longest Bounded-Difference Subarray
- Minimum Spanning Tree - Kruskal's Algorithm
- Lexicographically Largest String After Deleting K Characters
- Group Balls by Sequence
- Linked List Group Reverse
- Binary Tree to DLL
- Clone List with Next and Random
- Min distance between two given nodes of a Binary Tree
- LRU Cache
- Box Stacking
- Alien Dictionary
- Smallest range in K lists
- Trapping Rain Water
- Max Circular Subarray Sum
- Smallest window containing all characters of another string
- Max of min for every window size
- Find median in a stream
- Solve the Sudoku
- Minimum Cost Path
- Burning Tree
- The Painter's Partition Problem-II
- Longest Prefix Suffix
- Circle of strings
- Longest repeating and non-overlapping substring
- Sum-string
- Edit Distance
- Minimum sum partition
- Stock Buy and Sell – Max K Transactions Allowed
- Matrix Chain Multiplication
- Median in a row-wise sorted Matrix
- Generalised Fibonacci numbers
- Boolean Parenthesization
- Longest valid Parentheses
- Possible Paths in a Tree
- N-Queen Problem
- Brackets in Matrix Chain Multiplication
- Articulation Point - II
- Travelling Salesman Problem
- Longest Path in a matrix
- Let's Play!!!
- Word Ladder II
- Split Array Largest Sum
- Kth Smallest Number in Multiplication Table
- Stock Buy and Sell – Max 2 Transactions Allowed
- Account Merge
- Chocolates Pickup
- Max min Height
- Meeting Rooms III
- Reverse a linked list
- Frequency in a Linked List
- Node at a given index in linked list
- Linked list of strings forms a palindrome
- Compare two linked lists
- Remove duplicates from an unsorted linked list
- Delete in a Doubly Linked List
- Inorder Traversal
- Reverse a Doubly Linked List
- Check for BST
- Mirror Tree
- Delete without head pointer
- Height of Binary Tree
- Kth from End of Linked List
- Middle of a Linked List
- Check If Circular Linked List
- Left View of Binary Tree
- Delete Middle of Linked List
- Decimal Equivalent of Binary Linked List
- Find Transition Point
- Remove Duplicates from a Sorted Linked List
- Level Order in spiral form
- DFS of Graph
- Stack using Linked List
- Insert a node in a BST
- BFS of graph
- Square Root
- Nodes without a Sibling
- Lowest Common Ancestor in a BST
- Largest subarray of 0's and 1's
- Remove Duplicates Sorted Array
- Level Order Line by Line
- Remove duplicates in array
- Leaves at Same Level or Not
- Third largest element
- Match specific pattern
- Multiply two linked lists
- Max distance between same elements
- Delete in a Singly Linked List
- Kth largest element in BST
- Array Duplicates
- Three way partitioning
- Level order traversal
- Inorder Successor in BST
- Disjoint set (Union-Find)
- Insert in a Sorted List
- Sum of leaf nodes in BST
- More than n/k Occurrences
- Max and min element in Binary Tree
- Reverse Using Stack
- Symmetric Tree
- Delete Alternate Nodes
- Construct BST from Postorder
- Find the Sum of Last N nodes of the Linked List
- Count Pairs whose sum is equal to X
- Find length of Loop
- Linked List Matrix
- Maximum Pairwise Computed Value
- Queue Reversal
- Reverse first K of a Queue
- Closest Neighbour in BST
- Delete Mid of a Stack
- Rotate doubly Linked List
- The New Line
- Swap the array elements
- Learning Structs
- Delete Array
- Find the Frequency
- Get min at pop
- Min Heap implementation
- Multiset Operations
- Multimap Operations
- First Set Bit
- Rightmost different bit
- K-th Bit is Set or Not
- Power of 2
- Wave Array
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Floor in a Sorted Array
- Roof Top
- Print adjacency list
- Transpose of Matrix
- Rotate by 90 degree
- Anagram
- Reverse Words
- Minimum indexed character
- Panagram Checking
- Non Repeating Character
- Parenthesis Checker
- Minimum indexed character
- Minimum Cost of ropes
- N meetings in one room
- Count number of hops
- Union of Arrays with Duplicates
- Missing in Array
- Product array puzzle
- Max Value Permutation
- Missing And Repeating
- Buildings receiving sunlight
- Find Kth Rotation
- Minimum Energy
- Common in 3 Sorted Arrays
- Number and the Digit Sum
- Sorted and Rotated Minimum
- Search in a Row-Column sorted matrix
- String Duplicates Removal
- Count pairs Sum in matrices
- Find Pair Given Difference
- Pairs with difference k
- Drive the car
- Swap and Maximize
- Single Number
- Alternate Positive Negative
- Kth distance
- Sherlock a Detective
- Nearest multiple of 10
- Reorganize The Array
- Facing the sun
- Greater on right side
- Twice Counter
- Two Sum - Pair with Given Sum
- Rearrange to Make arr[i] = i
- Number of occurrence
- Does array represent Heap
- Find missing in second array
- String's Count
- Longest Common Prefix of Strings
- Largest Fibonacci Subsequence
- Prime String
- Maximum difference Indexes
- Counts Zeros Xor Pairs
- Two sum -Pairs with 0 Sum
- Sum of f(a[i], a[j]) over all pairs in an array of n integers
- Inverse Permutation
- At Least K Occurrences
- Find the closest pair from two arrays
- Count the Zeros
- Length of longest subarray
- The Counting Game !!
- Palindrome String
- Total count
- Pair with given sum in a sorted array
- Minimum changes to make all substrings distinct
- Padovan Sequence
- Karatsuba Algorithm
- Divisibility by 8
- Number of 1 Bits
- Check if a Integer is power of 8 or not
- Armstrong Numbers
- Love For The Twins
- Max Sum Subarray of size K
- Nth Fibonacci Number
- Count Digits
- Game of Nim
- Party of Couples
- Sieve of Eratosthenes
- Count numbers containing 4
- Euler Totient Function
- Reach the Nth point
- Page Faults in LRU
- Find nth root of m
- Recursive sequence
- Inorder Traversal and BST
- Array to BST
- Construction of a string
- Insert an Element at the Bottom of a Stack
- Find pairs with given sum in doubly linked list
- Fibonacci series up to Nth term
- Search in Linked List
- Remove duplicates from a sorted doubly linked list
- Array to Linked List
- Binary Search Trees
- Introduction to Doubly Linked List
- Unique Binary Tree Requirements
- Max Level Sum in Binary Tree
- Unique Number of Occurrences
- Sorting Items
- Bridge on Bits
- Antique Collections
- Occurrences of 101
- Chocolate Distribution
- Two Smallests in Every Subarray
- Split an array into two equal Sum subarrays
- Largest Pair Sum
- Maximizing Productivity
- Two Swaps
- Maximize partitions in a String
- Count pairs with given sum
- Intersection of Two arrays with Duplicate Elements
- Search in a row-wise sorted matrix
- Implement Lower Bound
- Implement Upper Bound
- Ceil in a Sorted Array
- Rotate Array
- Sort String
- Print Linked List
- Count Linked List Nodes
- Power of Four
- Size of Binary Tree
- Count Leaves in Binary Tree
- Postorder Traversal
- Implement stack using array
- Queue using Linked List
- Queue Using Array
- Doubly linked list Insertion at given position
- Replace all 0's with 5
- Preorder Traversal
- Sum Except First and Last
- Search a node in BST
- C++ STL | Set 8 (unordered set)
- Peak element
- Linked List Insertion At End
- Play with an array
- Minimum element in BST
- Is Linked List Length Even?
- Identical Linked Lists
- Triplet Family
- Sum of Binary Tree
- Insert in Middle of Linked List
- Pairwise Consecutive Elements
- Count Non-Leaf Nodes in Tree
- Alternates in an Array
- Sort and Reverse Vector
- Front to Back
- Stack designer
- Queue Push & Pop
- Set Operations
- Start coding - C
- Sum of diagonals
- Binary Array Sorting
- Check if a string is Isogram or not
- Binary String
- Reverse a String
- Binary Array Sorting
- C++ Hello World
- At least two greater elements
- Alternative Sorting
- Check Binary String
- Convert a list of characters into a String
- Confused pappu
- Segregate Even and Odd numbers
- Immediate Smaller Element
- Reversing the vowels
- Remove repeated digits in a given number
- First 1 in a Sorted Binary Array
- Max and Min Product from 2 Arrays
- Display longest name
- Find element at a given Index
- Substrings with same first and last characters
- Rotate Array by One
- Ishaan Loves Chocolates
- Split Strings
- Min and Max in Array
- Reducing Walls
- Average Count Array
- Find unique element
- Binary representation
- Even Odd Sum
- Find the fine
- Leap Year
- Fibonacci to N
- Krishnamurthy number
- Check if two given circles touch each other
- Series AP
- Find The Sequence
- C++ 2-D Arrays | Set-2
- The dice problem
- G.F Series
- Anshuman's Favourite Number
- Height of Heap
- Doctors Clinic
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