- Abstract Data Types
- Check if a number can be written as sum of three consecutive integers
- Find length of longest subsequence of one string which is substring of another string
- Thue-Morse sequence
- Shuffle 2n integers in format {a1, b1, a2, b2, a3, b3, ......, an, bn} without using extra space
- Puzzle | (Round table coin game)
- Check mirror in n-ary tree
- Queries on XOR of greatest odd divisor of the range
- Recursive program to print formula for GCD of n integers
- Check if a line touches or intersects a circle
- Sylvester's sequence
- Golomb sequence
- Minimum cost to convert 3 X 3 matrix into magic square
- Maximize the binary matrix by filpping submatrix once
- Buy Maximum Stocks if i stocks can be bought on i-th day
- Remove array end element to maximize the sum of product
- Find minimum radius such that atleast k point lie inside the circle
- Maximum points from top left of matrix to bottom right and return back
- Longest Increasing Path in Matrix
- Longest Common Subsequence with at most k changes allowed
- Maximum value of |arr[i] - arr[j]| + |i - j|
- Queries on probability of even or odd number in given ranges
- Minimum tiles of sizes in powers of two to cover whole area
- Lexicographically largest subsequence such that every character occurs at least k times
- Maximize the sum of arr[i]*i
- Lexicographically smallest string whose hamming distance from given string is exactly K
- Tile Stacking Problem
- Largest number less than N whose each digit is prime number
- Length of Longest Balanced Subsequence
- Woodall Number
- Pierpont Prime
- Pairs of Positive Negative values in an array
- Sum of Binomial coefficients
- Magnet Puzzle | Backtracking-9
- Delannoy Number
- Only integer with positive value in positive negative value in array
- Number of visible boxes after putting one inside another
- Queries for maximum difference between prime numbers in given ranges
- Find trace of matrix formed by adding Row-major and Column-major order of same matrix
- Narayana number
- Count subarrays where second highest lie before highest
- Minimum cost to make Longest Common Subsequence of length k
- Check if possible to cross the matrix with given power
- Nicomachus’s Theorem (Sum of k-th group of odd positive numbers)
- Number of palindromic subsequences of length k where k <= 3
- Leyland Number
- Schröder–Hipparchus number
- Sexy Prime
- Count of arrays having consecutive element with different values
- Length of longest balanced parentheses prefix
- Maximum difference of zeros and ones in binary string
- Motzkin number
- Sum of squares of first n natural numbers
- Number of ways to insert a character to increase the LCS by one
- Maximize volume of cuboid with given sum of sides
- Lobb Number
- Newman–Shanks–Williams prime
- Queries on Left and Right Circular shift on array
- Balanced Prime
- Encrypt string with product of number of vowels and consonants in substring of size k
- Eulerian Number
- Ways to split array into two groups of same XOR value
- Pascal Matrix
- Queries on XOR of XORs of all subarrays
- Entringer Number
- Different ways to sum n using numbers greater than or equal to m
- Telephone Number
- Minimum flip required to make Binary Matrix symmetric
- Sum of Manhattan distances between all pairs of points
- Game of Nim with removal of one stone allowed
- Hosoya's Triangle
- Add given n time durations
- Maximum binomial coefficient term value
- Leibniz harmonic triangle
- Divide cuboid into cubes such that sum of volumes is maximum
- Trinomial Triangle
- Find sum of even index binomial coefficients
- Sum of squares of binomial coefficients
- Sum of Arithmetic Geometric Sequence
- Diagonally Dominant Matrix
- Range Query on array whose each element is XOR of index value and previous element
- Fibonomial coefficient and Fibonomial triangle
- Check whether a given string is Heterogram or not
- Number of parallelograms when n horizontal parallel lines intersect m vertical parallellines
- Panalphabetic window in a string
- Add two numbers represented by two arrays
- Jacobsthal and Jacobsthal-Lucas numbers
- Check if two trees are Mirror | Set 2
- Check if the given two numbers are friendly pair or not
- Number of strings of length N with no palindromic sub string
- Recursive sum of digits of a number formed by repeated appends
- Divide a big number into two parts that differ by k
- Product of given N fractions in reduced form
- Rencontres Number (Counting partial derangements)
- Number of jump required of given length to reach a point of form (d, 0) from origin in 2D plane
- Largest subset with maximum difference as 1
- Sum of product of each element with each element after it
- Print all sequences starting with n and consecutive difference limited to k
- Number of loops of size k starting from a specific node
- Ways to split string such that each partition starts with distinct character
- Check if bitwise AND of any subset is power of two
- Move matrix elements in given direction and add elements with same value
- Count of 'GFG' Subsequences in the given string
- Arithmetic Number
- Check if a queue can be sorted into another queue using a stack
- Queries on sum of odd number digit sums of all the factors of a number
- Sum of sum of first n natural numbers
- Check if a given matrix is Hankel or not
- Sum of square-sums of first n natural numbers
- Reflection of a point at 180 degree rotation of another point
- Forming smallest array with given constraints
- Triplets in array with absolute difference less than k
- Minimum bit changes in Binary Circular array to reach a index
- Construct an array from GCDs of consecutive elements in given array
- Number of circular tours that visit all petrol pumps
- Lexicographically Kth smallest way to reach given coordinate from origin
- Number of arrays of size N whose elements are positive integers and sum is K
- Minimum cost to equal all elements of array using two operation
- Sum of product of r and rth Binomial Coefficient (r * nCr)
- Check if three straight lines are concurrent or not
- Queries on number of Binary sub-matrices of Given size
- Find the GCD that lies in given range
- Check if mirror image of a number is same if displayed in seven segment display
- Print concentric rectangular pattern in a 2d matrix
- Maximum value in a matrix which contain intersecting concentric submatrix
- Number of Distinct Meeting Points on a Circular Road
- Check if array sum can be made K by three operations on it
- Sum of product of consecutive Binomial Coefficients
- Check if the n-th term is odd or even in a Fibonacci like sequence
- Total number of decreasing paths in a matrix
- Number of refills to complete the journey of N km
- Check if a line at 45 degree can divide the plane into two equal weight parts
- Minimum operation require to make first and last character same
- Check if the given chessboard is valid or not
- Queries on insertion of an element in a Bitonic Sequence
- Queries to check if it is possible to join boxes in a circle
- Count common subsequence in two strings
- Lexicographically largest prime path from top-left to bottom-right in a matrix
- Traverse matrix in L shape
- Maximum number that can be display on Seven Segment Display using N segments
- Generate two BSTs from the given array such that maximum height among them is minimum
- Length of the largest substring which have character with frequency greater than or equal to half of the substring
- Number of sub-sequence such that it has one consecutive element with difference less than or equal to 1

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