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RishabhMalik
STREAK
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Language Used
C++, C
Coding Score
757
Problem Solved
300
Contest Rating
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1403 points
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1403 points
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1 Point
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100 Point
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14 submissions in current year
SCHOOL (0)
BASIC (40)
EASY (127)
MEDIUM (123)
HARD (10)
- Sorting Elements of an Array by Frequency
- Sort a linked list of 0s, 1s and 2s
- Add Number Linked Lists
- Merge 2 sorted linked list in reverse order
- Detect Loop in linked list
- Insert in Sorted Circular Linked List
- Count BST nodes that lie in a given range
- Check for BST
- Merge Sort
- Quick Sort
- Bottom View of Binary Tree
- Delete without head pointer
- Intersection in Y Shaped Lists
- Diameter of a Binary Tree
- Merge two sorted linked lists
- Sum Tree
- Connect Nodes of Levels
- Stack using Queue
- Implement stack using array
- Directed Graph Cycle
- Undirected Graph Cycle
- LCA in Binary Tree
- Lowest Common Ancestor in a BST
- Largest subarray with 0 sum
- Topological Sort
- Find the number of islands
- Get Min from Stack
- Dijkstra Algorithm
- Minimum Spanning Tree
- Minimum Swaps to Sort
- Implement Atoi
- Palindrome Linked List
- Strongly Connected
- Bipartite Graph
- Count distinct elements in every window
- Sort a stack
- Top View of Binary Tree
- Level order traversal
- Peak element
- Union of Two Linked Lists
- Euler Circuit in an Undirected Graph
- Euler circuit and Path
- Vertical sum
- Isomorphic Trees
- Children Sum in a Binary Tree
- Diagonal sum in binary tree
- Kth Ancestor in a Tree
- ZigZag Tree Traversal
- Count Number of SubTrees
- Mother Vertex
- Ceil in BST
- Reverse array in groups
- Smallest Positive Missing
- Wave Array
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Count Inversions
- Smallest Positive missing number
- Union of 2 Sorted Arrays
- Indexes of Subarray Sum
- Merge Without Extra Space
- Spirally traversing a matrix
- Search in a sorted Matrix
- Rotate by 90 degree
- Distance of nearest cell having 1
- Unit Area of largest region of 1's
- Sort Elements by Decreasing Frequency
- Strings Rotations of Each Other
- Postfix Evaluation
- Next Greater Element
- Infix to Postfix
- Kth largest element
- K Most occurring elements
- Minimum Cost of ropes
- Fractional Knapsack
- Job Sequencing Problem
- Minimum Platforms
- Stickler Thief
- Longest Increasing Subsequence
- Longest Common Subsequence
- Sort according to an Array
- X Total Shapes
- Zero Sum Subarrays
- Find whether path exist
- Implement Trie
- Rotten Oranges
- Steps by Knight
- Print Anagrams Together
- Rotate by 90 degree
- Top K Frequent in Array
- Excel Sheet | Part - 1
- Sort 0s, 1s and 2s
- Pair Sum Closest to 0
- Form the Largest Number
- Add Binary Strings
- Row with max 1s
- Check if frequencies can be equal
- Column name from a given column number
- Sum of two large numbers
- Max Sum without Adjacents
- Factorials of large numbers
- Reverse each word in a given string
- k largest elements
- K-th element of two Arrays
- Number following a pattern
- Subarrays Product Less than K
- Fibonacci Sum
- Knapsack with Duplicate Items
- Array Pair Sum Divisibility Problem
- Knight Walk
- Find nth root of m
- Stream First Non-repeating
- Eulerian Path in an Undirected Graph
- Count the paths
- Floyd Warshall
- Negative weight cycle
- Flood fill Algorithm
- Shortest Source to Destination Path
- Subset Sum Problem
- Frog Jump
- Reverse a linked list
- Frequency in a Linked List
- Pairwise swap elements of a linked list
- Split a Linked List into two halves
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Two Mirror Trees
- 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
- Transform to Sum Tree
- Intersection Sorted Linked Lists
- Find Transition Point
- Queue using two Stacks
- Level Order in spiral form
- Reverse Level Order Traversal
- DFS of Graph
- Stack using Linked List
- BFS of graph
- Identical Trees
- Root to leaf path sum
- Square Root
- Nodes without a Sibling
- Binary Search
- Run Length Encoding
- Remove Duplicates Sorted Array
- Level Order Line by Line
- BST Keys in a Range
- Odd even level difference
- Equilibrium index of an array
- Remove every k'th node
- Convert to Roman No
- Match specific pattern
- Max distance between same elements
- Longest Consecutive Subsequence
- Kth largest element in BST
- Special Stack
- Intersection of Two Linked Lists
- Minimum element in BST
- Counting Sort
- Reverse Using Stack
- Symmetric Tree
- Construct BST from Postorder
- Maximum Pairwise Computed Value
- Reverse first K of a Queue
- Deletion in a Binary Tree
- Closest Neighbour in BST
- Sum of Leaf Nodes at Min Level
- Swap the array elements
- First Set Bit
- Rightmost different bit
- Check K-th Bit
- Digits In Factorial
- GP Term
- Primality Test
- Longest Consecutive 1's
- Modular Inverse
- Power of 2
- Swap odd and even bits
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Intersection of two sorted arrays
- Print adjacency list
- Transpose of Matrix
- Print Non-Repeated Elements
- Anagram
- Isomorphic Strings
- Most Frequent Character
- Reverse Words
- Minimum indexed character
- Non Repeating Character
- Parenthesis Checker
- Generate Binary Numbers
- N meetings in one room
- Largest number with given sum
- First Repeating Element
- Common Elements
- Check Equal Arrays
- Maximium Sum
- Numbers containing 1, 2 and 3
- Find Immediate Smaller Than X
- Two Sum
- Missing in Array
- Roman Number to Integer
- Reverse The Array
- Search an element in sorted and rotated array
- Circular Linked List Delete at Position
- Missing And Repeating
- Buildings receiving sunlight
- Non-Repeating Element
- Common in 3 Sorted Arrays
- Maximum no of 1's row
- Search in a Row-Column sorted matrix
- Move All Zeroes to End
- String Duplicates Removal
- Remove Duplicates
- Nearest multiple of 10
- Two Sum - Pair with Given Sum
- Second most repeated string in a sequence
- Find all pairs with a given sum
- Min Number of Flips
- Two sum -Pairs with 0 Sum
- Segregate 0s and 1s
- At Least K Occurrences
- Element with left side smaller and right side greater
- First and Second Smallests
- Pair with given sum in a sorted array
- Is Binary Number Multiple of 3
- Midori and chocolates
- Nth Fibonacci Number
- Element that appears once where every element occurs twice
- Party of Couples
- Shortest path from 1 to n
- Minimum number of Coins
- Palindrome numbers
- Maximum height of the staircase
- Carry counter
- Rectangles in N*N Board
- Squares in N*N Chessboard
- Geek and his Tricky Series
- Overlapping rectangles
- Sum of dependencies in a graph
- Print Linked List
- Check for Binary String
- Count Leaves in Binary Tree
- Queue using Linked List
- Queue Using Array
- First Occurence
- Smallest divisible number
- Remainder with 7
- longest substring containing '1'
- Count Odd and Even
- Queue Push & Pop
- Who has the majority?
- Absolute Value
- Convert Celsius To Fahrenheit
- Quadratic Equation Roots
- Bit Difference
- Number is sparse or not
- Print 1 To N Without Loop
- Adding two matrices
- Multiply the matrices
- Remove common characters and concatenate
- Sum of Digits of a Number
- Fibonacci Using Recursion
- Addition Under Modulo
- Reverse a String
- Missing Characters in Panagram
- First n Fibonacci
- Ishaan's Internship
- Uncommon characters
- Same frequency in two halves
- Repeated Character
- Replace the Bit
- Merge two strings
- Last duplicate element in a sorted array
- Array Subset
- Boolean String Value
- Find position of set bit
- Set kth bit
- Ishaan's Sum Problem
- Difference series