S
sachinupreti190
STREAK
55/1470
days
Longest streak/Global longest streak
Language Used
C++, Java, Python, C
Coding Score
2498
Problem Solved
902
Contest Rating
__
323 points
Contributor
323 points
Contributor
1 Point
Proficient
Proficient
100 Point
Scholar
Scholar
1k Point
Master
Master
10k Point
Ace
Ace
50k Point
0 submissions in current year
SCHOOL (1)
BASIC (75)
EASY (408)
MEDIUM (372)
HARD (46)
- Nearly Sorted Algorithm
- Rotate a Linked List
- Sort a linked list of 0s, 1s and 2s
- Add Number Linked Lists
- Detect Loop in linked list
- Insert in Sorted Circular Linked List
- Merge Sort
- Quick Sort
- Bottom View of Binary Tree
- Delete without head pointer
- Heap Sort
- Merge two sorted linked lists
- Tree Boundary Traversal
- Absolute List Sorting
- Two Stacks in an Array
- Largest subarray with 0 sum
- Topological sort
- Vertical Tree Traversal
- Merge K sorted linked lists
- Find the number of islands
- Find kth element of spiral matrix
- Max sum in the configuration
- Extreme nodes in alternate order
- Kth smallest element in a Matrix
- Additive sequence
- Count Palindromic Subsequences
- Multiply two strings
- Minimum Swaps to Sort
- Implement Atoi
- Palindrome Linked List
- Closest in BST
- Pots of Gold Game
- Count distinct elements in every window
- k-Anagram
- Merge k Sorted Arrays
- Find triplets with zero sum
- Sort a stack
- Top View of Binary Tree
- k-th Smallest in BST
- Level order traversal
- Peak element
- Merge Sort for Linked List
- Union of Two Linked Lists
- Pair Sum in BST
- Occurences of 2 as a digit
- Counting elements in two arrays
- Linked List that is Sorted Alternatingly
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Arrange Consonants and Vowels
- Count the nodes at distance K from leaf
- Insert in Sorted way in a Sorted DLL
- Predecessor and Successor
- Children Sum in a Binary Tree
- Deletion and Reverse in Circular Linked List
- ZigZag Tree Traversal
- C++ Generic sort
- Swap Kth nodes from ends
- Ceil in BST
- Count set bits
- Maximum AND Value
- Reverse array in groups
- Smallest Positive Missing
- Power Of Numbers
- Wave Array
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Stock buy and sell
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Count Inversions
- Two Repeated Elements
- Union of 2 Sorted Arrays
- Indexes of Subarray Sum
- Triplet Sum in Array
- Merge Without Extra Space
- Boolean Matrix
- 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
- Subarray with 0 sum
- Subarrays with equal 1s and 0s
- Sort Elements by Decreasing Frequency
- Longest Consecutive Subsequence
- Strings Rotations of Each Other
- Case-specific Sorting of Strings
- Stock span problem
- Next Greater Element
- K Sized Subarray Maximum
- Nearly sorted
- Fractional Knapsack
- Minimum Platforms
- Black and White
- Combination Sum
- Unique Subsets
- Minimum Jumps
- Ways to Reach the n'th Stair
- Longest Increasing Subsequence
- Longest Common Subsequence
- 0 - 1 Knapsack Problem
- Sort according to an Array
- Allocate Minimum Pages
- Zero Sum Subarrays
- Kth Smallest
- Implement Trie
- Shortest Common Supersequence
- Nth Catalan Number
- Most frequent word in an array of strings
- Container With Most Water
- Print Anagrams Together
- Rotate by 90 degree
- Top K Frequent in Array
- Stock Buy and Sell – Multiple Transaction Allowed
- Generate Parentheses
- Word Search
- 4 Sum - All Quadruples
- Sort 0s, 1s and 2s
- Maximum Sub Array
- Maximum Index
- Number of subarrays with maximum values in given range
- Sum of Subarrays
- Equal Sum
- Top k numbers in a stream
- Maximize Number of 1's
- Sum of Middle elements of two sorted arrays
- Equivalent Sub-Arrays
- Single Among Doubles in a Sorted
- Count Occurences of Anagrams
- Single Among Doubles
- Happiest Triplet
- Painting the Fence
- Pair Sum Closest to 0
- Search in Rotated Sorted Array
- Smallest number with at least n trailing zeroes in factorial
- Count pairs Sum in matrices
- Sum of bit differences
- Count Full Binary Trees
- Maximize The Array
- Form the Largest Number
- Alternate Vowel and Consonant String
- Add Binary Strings
- Super Primes
- Subarray Sum Divisible By K
- Maximum Product Subarray
- Longest subarray with sum divisible by K
- Row with max 1s
- Swapping pairs make sum equal
- Check if frequencies can be equal
- Form a palindrome
- Maximum distinct elements after removing K elements
- Longest Subarray with Sum K
- Cutting Binary String
- Sum of two large numbers
- Reverse each word in a given string
- Find the N-th character
- Length of the longest substring
- k largest elements
- Longest Common Substring
- Smallest distinct window
- Longest substring with distinct characters
- Longest Substring with K Uniques
- Longest Palindrome in a String
- K-th element of two Arrays
- Arranging the array
- Triplets with Smaller Sum
- Rod Cutting
- Maximize the sum of selected numbers from a sorted array to make it empty
- Smallest Absolute Difference
- LCS of three strings
- Longest Palindromic Subsequence
- First negative in every window of size k
- Minimum sum
- Build the smallest
- Minimize the Heights II
- Transform to prime
- First and Last Occurrences
- Palindrome in Alphanumeric String
- Smaller on Left
- Maximum Product of Increasing Subsequence of Size 3
- Nine Divisors
- Valid Substring
- Permutations of a String
- CamelCase Pattern Matching
- Subarrays Product Less than K
- Unique Number II
- Ways to sum to N
- Largest prime factor
- 3 Divisors
- Coin Change (Count Ways)
- Sequence of Sequence
- Santa Banta
- Gold Mine Problem
- Coin Change (Minimum Coins)
- Power Of 2 and Subsequences
- Kth Smallest Factor
- Shreyansh and his bits
- Power Set
- Count ways to N'th Stair(Order does not matter)
- Find distinct elements
- nCr
- Longest Bitonic subsequence
- Min Coin
- Count digit groupings of a number
- Array Pair Sum Divisibility Problem
- Magic Triplets
- Matchsticks game
- N trailing zeroes in factorials
- Killing Spree
- Unique partitions
- Prime Pair with Target Sum
- Count Numbers in Range
- Yes XOR No
- Nth Natural Number
- Number of paths in a matrix with k coins
- Choose and Swap
- LCM Triplet
- Return two prime numbers
- Count Total Setbits
- Find nth root of m
- Find Prime numbers in a range
- Power of Largest Prime
- Game with String
- Count even length
- Find the Safe Position
- Smith Number
- Rotate a Matrix by 180 Counterclockwise
- Next Permutation
- Missing number in matrix
- Rank The Permutations
- Prime factorization and geek number
- Smaller on Left
- Filling Bucket
- Longest Repeating Subsequence
- Composite and Prime
- Stream First Non-repeating
- Count Divisors
- Segregate even and odd nodes in a Linked List
- Kth Largest in a Stream
- Geek and Strings
- Pairs of Non Coinciding Points
- Satisfy the equation
- 7 Segment Display
- Product of Primes
- Two odd Occuring
- Queries on Strings
- Special Matrix
- Biconnected Graph
- Negative weight cycle
- Base Equivalence
- Height Using Parent Array
- Reverse Spiral Form of Matrix
- Save Your Life
- Missing Point of a Parallelogram
- Recursively Remove Adjacent Duplicates
- Theft at World Bank
- Spiral Matrix
- Valid Pair Sum
- Triplets in Sorted Linked List
- Spidey Sense
- Escape the Forbidden Forest
- Iterative Inorder
- Preorder traversal (Iterative)
- Subset Sum Problem
- Form a palindrome
- Gray Code
- Subarrays with sum K
- Partition a Linked List around a given value
- Searching an element in a sorted array (Ternary Search)
- Coin Piles
- Rearrange characters
- Substrings of length k with k-1 distinct elements
- Binary Searchable elements
- Count pairs in array divisible by K
- Prefix match with other strings
- Find rectangle with corners as 1
- Paths from root with a specified sum
- Shortest Prime Path
- Division without using multiplication, division and mod operator
- Sort for Singly Linked List
- Remove all occurences of duplicates in a linked list
- Subsets
- Rank The Permutations
- Anti Diagonal Traversal of Matrix
- IPL 2021 - Match Day 2
- Unique Number III
- All Unique Permutations of an array
- Course Schedule
- Minimum times A has to be repeated such that B is a substring of it
- Bitwise AND of the Array
- Overlapping Intervals
- Remove and Reverse
- Find k-th smallest element in given n ranges
- Reverse a Stack
- Farthest number
- Maximum product subset of an array
- Robots
- K-th Largest Sum Contiguous Subarray
- Hit most Balloons
- Max Equal sum of 3 Stacks
- Concatenate Equal to Target
- Exactly one swap
- Maximum Winning score
- Compute Before Matrix
- Smallest sum contiguous subarray
- Stack Permutations
- Graph is Tree or Not
- Replace every element with the least greater element on its right
- LCP
- Next element with greater frequency
- Minimum increment/decrement to make array non-Increasing
- Check if all levels of two trees are anagrams or not
- Number of Distinct Islands
- Merging Details
- Common String
- Optimal Array
- Aggressive Cows
- Combination Sum II
- Task Scheduler
- Hands of Straights
- Lemonade Change
- Replace elements by its rank in the array
- Floor in BST
- Maximum Value
- Make array elements unique
- Next Greater Element in Circular Array
- Carpet into Box
- Minimum X (xor) A
- Geeks And The String
- Find the longest string
- Minimum repeat to make substring
- Prime List
- Water the plants
- Maximum Intersecting Lines
- Count Special Numbers
- Minimum Steps Required
- Number of Pairs
- Make Array Beautiful
- Distribute Chocolates
- Second smallest number
- Distinct Difference
- Character Exchange
- Maximum Length
- Remove the balls
- Unequal Arrays
- Bheem Wants Ladoos
- Prefix Suffix String
- Smaller Sum
- Fest and Posters
- Empty the String
- Nearest smaller tower
- Another Coin Change Problem
- Geek's Village and Wells
- Powerful Integer
- Max Coins
- Good Subtrees
- Subtree In N-ary Tree
- Easy Task
- Add Minimum Characters
- Maximum subset sum
- Palindrome with minimum sum
- Count Total Setbits
- Construct a Full Binary Tree
- Help Big Pig
- Modify Linked List-1
- Gathering Boulders
- Find Kth permutation
- Candy Shop II
- Maximum Energy
- Pairs violating the BST property
- Winner of an election
- Reverse squared sum
- Geek and his Marks
- Kth Frequency
- K larger values
- K larger values ||
- Geek-onacci Number
- Power of 3
- Geek-onacci Number ||
- Reverse a linked list
- Frequency in a Linked List
- Node at a given index in linked list
- Delete nodes having greater value on right
- Remove duplicates from an unsorted linked list
- Inorder Traversal
- Reverse a Doubly Linked List
- Bubble Sort
- Selection Sort
- Insertion Sort
- Check for BST
- Right View of Binary Tree
- Mirror Tree
- Maximum Width of Tree
- 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
- Intersection Sorted Linked Lists
- Find Transition Point
- Queue using two Stacks
- Remove Duplicates from a Sorted Linked List
- Level Order in spiral form
- Reverse Level Order Traversal
- Insert a node in a BST
- BFS of graph
- Identical Trees
- Square Root
- Lowest Common Ancestor in a BST
- Binary Search
- Run Length Encoding
- Largest subarray of 0's and 1's
- Remove Duplicates Sorted Array
- Level Order Line by Line
- Minimum Depth of a Binary Tree
- Remove Duplicates from an array
- Odd even level difference
- Equilibrium index of an array
- Unique rows in boolean matrix
- Remove every k'th node
- Leaves at Same Level or Not
- Third largest element
- Convert to Roman No
- Delete in a Singly Linked List
- Kth largest element in BST
- Array Duplicates
- Max Level Sum in Binary Tree
- Three way partitioning
- Index of an Extra Element
- Intersection of Two Linked Lists
- Insert in a Sorted List
- Level of a Node in Binary Tree
- More than n/k Occurrences
- Counting Sort
- Reverse Using Stack
- Delete Alternate Nodes
- Find the Sum of Last N nodes of the Linked List
- Next Right Node
- Count Pairs whose sum is equal to X
- Find length of Loop
- Queue Reversal
- Reverse first K of a Queue
- Magical Number
- Nodes at Odd Levels
- Move all zeros to the front of the linked list
- Delete Mid of a Stack
- Product of an Array
- C++ Function overloading
- The New Line
- Data Types
- Taking input
- Learn to Comment
- Learning to be precise
- Bitwise Operators
- For Loop- primeCheck
- While loop- printTable
- Learning Macros
- Swap the array elements
- Count the Specials
- Consonants and Vowels check
- Delete Array
- Find the Frequency
- Pair Sum in Vector
- Frequency in Queue
- Frequency Game
- Duplicate Elements
- First Set Bit
- Rightmost different bit
- Check K-th Bit
- Longest Consecutive 1's
- Power of 2
- Swap odd and even bits
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Floor in a Sorted Array
- Minimum Number in a sorted rotated array
- Roof Top
- Print adjacency list
- Transpose of Matrix
- Check if a string is Isogram or not
- Anagram
- Winner of an election
- String Rotated by 2 Places
- Most Frequent Character
- The Modified String
- Reverse Words
- Sum of numbers in string
- Minimum indexed character
- Panagram Checking
- Non Repeating Character
- Parenthesis Checker
- K largest elements
- Minimum Cost of ropes
- Largest number with given sum
- Reach a given score
- Count ways to N'th Stair
- Count number of hops
- Pattern searching
- First Repeating Element
- Union of Arrays with Duplicates
- Common Elements
- Check Equal Arrays
- Missing in Array
- Product array puzzle
- Search an element in sorted and rotated array
- Intersection of Arrays with Distinct
- Mean of range in array
- Max Value Permutation
- Missing And Repeating
- Subarrays with given sum
- Non-Repeating Element
- Pairs of equals Sum
- Find Kth Rotation
- Find the closest number
- Sort by Set Bit Count
- k sorted array
- Balance with respect to an array
- Adding Ones
- Common in 3 Sorted Arrays
- Good Pairs
- Number and the Digit Sum
- Sorted and Rotated Minimum
- Maximum no of 1's row
- Sum of elements between k1'th and k2'th smallest elements
- Next greater number set digits
- Search in a Row-Column sorted matrix
- Move All Zeroes to End
- String Duplicates Removal
- Min sum formed by digits
- Minimize the sum of product
- Missing number
- Move all negative elements to end
- Chocolate Distribution Problem
- Count the triplets
- Find Pair Given Difference
- Bitonic Point
- Left most and right most index
- Smallest subarray with sum greater than x
- Partition Point in the Array
- Alternate Positive Negative
- Check if actual binary representation of a number is palindrome
- Remaining String
- Closing bracket index
- Remove Consecutive Characters
- Common Subsequence
- Remove b and ac from a given string
- Palindrome Sentence
- Check if the number is balanced
- Rearrange a string
- Remove Duplicates
- Reverse alternate words
- Same characters in two strings
- Convert the string
- Twice Counter
- Distinct Substrings
- Word with maximum frequency
- Second Largest
- Convert array into Zig-Zag fashion
- Two Sum - Pair with Given Sum
- Second most repeated string in a sequence
- Equal point in a string of brackets
- Find all pairs with a given sum
- Number of occurrence
- K-Pangrams
- Reversing the equation
- Find the most frequent digit
- Convert an array to reduced form
- Check if array is sorted
- Sum Pair closest to target
- Find missing in second array
- String's Count
- Longest Common Prefix of Strings
- First Repeated Character
- Prime String
- Numbers with prime frequencies greater than or equal to k
- Special array reversal
- Maximum difference Indexes
- Counts Zeros Xor Pairs
- Two sum -Pairs with 0 Sum
- Segregate 0s and 1s
- Hungry Pizza Lovers
- At Least K Occurrences
- Element with left side smaller and right side greater
- Common Divisor
- Maximum sum of increasing order elements from n arrays
- Merging two unsorted arrays in sorted order
- Count the Zeros
- Length of longest subarray
- Merge two binary Max heaps
- Maximum sum of subarray less than or equal to x
- Four Elements
- Palindrome String
- Maximum average subarray
- Palindromic Series
- Smallest greater elements in whole array
- Fitting The Array
- Pangram Strings
- Pair with given sum in a sorted array
- Pattern Searching
- Divisible by 7
- Shop in Candy Store
- Minimum changes to make all substrings distinct
- Tom and String
- Lucas Number
- Partition a number into two divisible parts
- Is Binary Number Multiple of 3
- Padovan Sequence
- Extract the Number from the String
- Minimum Operations
- Divisibility by 8
- Adding Array Elements
- Number of 1 Bits
- Find the Highest number
- Check if a Integer is power of 8 or not
- The Nth Fibonnaci
- Compute sum of digits in all numbers from 1 to n
- K Smallests in the Original Order
- Reverse Bits
- Max Sum Subarray of size K
- Nth Fibonacci Number
- Change Bits
- Copy Set Bits in Range
- Sum Of Digits
- Prime Number
- Powers game
- Maximum Sum Problem
- Count Odd Factors
- Count numbers containing 4
- Exponentiation (Set 2)
- Find maximum number
- The Bit Game
- Swap bits
- Reach the Nth point
- Minimum number of Coins
- Number Of Open Doors
- Carol Numbers
- Break a number
- Find unit digit in a Product
- Numbers with same first and last digit
- Perfect Numbers
- Nth item through sum
- Palindrome numbers
- Even Fibonacci Numbers Sum
- Kth Prime Factor
- Possible Pairs
- Smallest number with sum of digits as N and divisible by 10^N
- Fibonacci Expression
- Maximize Toys
- Raju and coins
- Largest number possible
- Largest sum of digits in all Divisors
- Carry counter
- Remainder of array multiplication
- Squares in N*N Chessboard
- Primorial of a number
- Deficient Number
- Trailing zeroes in factorial
- Form a number divisible by 3 using array digits
- Sum of all prime numbers between 1 and n
- Least Prime Factor
- Sum of First N Natural Numbers
- Tom and Jerry
- Summed Matrix
- Maximum Diamonds
- Arithmetic Number
- Row with Minimum 1s
- Geek and his Tricky Series
- Count Primes In Range
- Lexicographically Previous Permutation
- Help Ishaan
- Trace Path
- Inorder Traversal and BST
- Sequence Fun
- Print Pattern
- Primes sum
- Crack the series
- Chicks in a Zoo
- Maximum Sum LCM
- Earthquake and the Paint Shop
- Count all possible paths from top left to bottom right
- Ball coloring
- Rearrange Geek and his Classmates
- Modified Numbers and Queries
- Print Diagonally
- Sum of two numbers without using arithmetic operators
- Search insert position of K in a sorted array
- Largest value in each level
- Maximum number of 2X2 squares
- First and last occurrences of x
- License Key Formatting
- Count the Substrings
- BitByBit
- The Ultimate Duel
- The Final Task
- Smallest Subset with Greater Sum
- Minimum Sum of Absolute Differences of Pairs
- Minimum Coins To Pay
- Smallest window containing 0, 1 and 2
- Move Last Element to Front of a Linked List
- Can Make Triangle
- Matrix Operations
- Find pairs with given sum in doubly linked list
- Triangle and Square
- Game Of Two
- Array Game
- Beautiful Number
- Maximum Number
- Complete the Staircase
- Even subarray sum
- Police Station
- Smallest factorial number
- Count the Substrings
- Kth Mex
- Bus Conductor
- Yet another query problem
- Minimum Number
- Make sum even
- Maximum Depth Of Binary Tree
- Geek left with No Food
- Find the String
- Bots on social media
- Array Operations
- Split Employees
- Minimize the sum
- Last modified ball
- Parent of Max GCD Siblings in a Binary Tree
- Find the first node of loop in linked list
- Type it!
- Min operations
- Is it Fibonacci
- High Frequency
- Balloon Everywhere
- Reverse both parts
- Make Array Elements Equal
- Equal Left and Right Subarray Sum
- Make the array beautiful
- Remainder on dividing by 11
- Geek's Excursion
- Is it Fibonacci
- Calculate The Work Done
- Number of Subarrays of 0's
- Maximum Identical Bowls
- Bus Conductor
- Guess the Number
- Wifi Range
- Minimum Number
- Select Maximum number
- String Mirror
- Maximize Sum
- Make Palindrome
- Geekina loves order
- Maximize The Number
- Binary Modulo
- Total Cuts
- Bit Magic
- Array Operations
- Dominant Pairs
- Total Traversal Time
- Valuable String
- Special Array
- Count the Substrings
- Wave Array
- Antique Collections
- How Many Meets
- Binary Array
- Ticket Counter
- Happy Friends
- Magic and toy shop
- Unique Number of Occurrences
- Balloon Everywhere
- Organic Tree
- Substrings with same value
- Candy shop I
- Find fun(x)
- Maximum Battalions
- Reorder List
- Binary Tree to DLL
- Min distance between two given nodes of a Binary Tree
- Subtraction in Linked List
- Merge Sort on Doubly Linked List
- String Permutations
- Trapping Rain Water
- Median of 2 Sorted Arrays of Different Sizes
- Merge Without Extra Space
- Search Pattern
- Count Smaller elements
- Longest Prefix Suffix
- Print kth character
- Next Happy Number
- Matrix Chain Multiplication
- Median in a row-wise sorted Matrix
- Boolean Parenthesization
- Brackets in Matrix Chain Multiplication
- Phone directory
- Adventure in a Maze
- Optimal binary search tree
- Word Wrap
- Maximum sum Rectangle
- Find the Maximum Flow
- Smallest Positive Integer that can not be represented as Sum
- Corona Vaccine
- Search Pattern (Z-algorithm)
- Search Pattern (Rabin-Karp Algorithm)
- Longest substring to form a Palindrome
- Number of distinct words with K maximum contiguous vowels
- Reverse a sublist of a linked list
- Distribute candies in a binary tree
- Split Array Largest Sum
- Find number of closed islands
- Shortest Path by Removing K walls
- Min Chars to Add for Palindrome
- Vertex Cover
- Expression Add Operators
- Partition the Array
- Count Binary Strings With No Consecutive 1s
- Minimum BST Sum Subtree
- Special Digits
- Cake Distribution Problem
- Min Time
- Game Of Subsets
- Geekina Hate 1s
- Rotate Array
- Sort String
- Weight of strings
- Find Length of Linked List
- Size of Binary Tree
- Postorder Traversal
- Count zeros in a sorted matrix
- Preorder Traversal
- Sum Except First and Last
- Search a node in BST
- Anagram of String
- Is Linked List Length Even?
- Identical Linked Lists
- Insert in Middle of Linked List
- longest substring containing '1'
- Start Coding
- The Size of
- Count Odd and Even
- Sort and Reverse Vector
- Sum of diagonals
- Number is sparse or not
- Array Search
- Sorted Array Search
- Remove common characters and concatenate
- Reverse a String
- First n Fibonacci
- C++ Hello World
- Find second largest element
- Searching in an Array
- Count pair sum
- Sort a String
- Sort Array II
- Change the string
- Immediate Smaller Element
- Count the characters
- Uncommon characters
- Fake Profile
- String Reversal
- Repeated Character
- Merge two strings
- String with numbers at its end
- Largest Element in Array
- Rotate Array by One
- Game with nos
- One odd Occuring
- Array Subset
- Rotating an Array
- Min and Max in Array
- Minimize string value
- Remove character
- Magical String[Duplicate Problem]
- GCD of two numbers
- Find unique element
- Addition of Two Numbers
- Find position of set bit
- LCM And GCD
- Strong Numbers
- Find N-th term in the series
- Factorial
- Special Odd Series Sum
- Difference series
- Check if the door is open or closed
- Sum of first n terms
- Pattern Printing
- Count Squares
- Check if the number is Fibonacci
- Middle of Three
- Anshuman's Favourite Number
- Make a Distinct Digit Array
- Max Min
- Alphanumeric String
- Pattern 1
- Pattern 11
- Naughty Geek
- Valid Strings
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