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DSA / Algorithms / Backtracking

Backtracking

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N-Queen II Problem

Last Updated: 23 July 2025

The N-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other. Given an integer n, return the number of distinct ...read more

Sudoku Problem in Python

Last Updated: 23 July 2025

Given a partially filled 9×9 2D array grid[9][9], the goal is to assign digits (from 1 to 9) to the empty cells so that every row, column, and subgrid of size 3×3 contains...read more

Backtracking Algorithm in Python

Last Updated: 23 July 2025

Backtracking is a problem-solving algorithmic technique that involves finding a solution incrementally by trying different options and undoing them if they lead to a dead ...read more

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Algorithms-Backtracking

Backtracking Algorithm

Last Updated: 23 July 2025

Backtracking algorithms are like problem-solving strategies that help explore different options to find the best solution. They work by trying out different paths and if o...read more

Algorithms-Backtracking

Algorithms-Recursion

Arrange rods to make K side Polygon

Last Updated: 23 July 2025

Given an array of rods[] of size N and an integer value K (3 = K = 6), where rods[i] (1 = rods[i] = 108) is the length of the ith rod(1 = rods.length = 10), the task is to...read more

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Permutations of an Array in lexicographical order.

Last Updated: 23 July 2025

Given an array arr[] of distinct integers, the task is to print all the possible permutations in lexicographical order.Examples:Input: arr = [1, 2, 3]Output: [[1, 2, 3], [...read more

Maximum and Minimum apples distribution limits

Last Updated: 23 July 2025

Given an integer N representing a number of apples and an array weights[] consisting weight of these apples. Distribute them to K people such that they receive equal-weigh...read more

Algorithms-Backtracking

Forming String with maximum occurrences

Last Updated: 23 July 2025

Given the maximum occurrences of a, b, and c in a string, the task is to make the string containing only a, b, and c such that no three consecutive characters are the same...read more

Backtracking meaning in DSA

Last Updated: 23 July 2025

Backtracking can be defined as a general algorithmic technique that considers searching every possible combination in order to solve a computational problem.Backtracking s...read more

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Definitions and Meanings

4 Queens Problem

Last Updated: 23 July 2025

The 4 Queens Problem consists in placing four queens on a 4 x 4 chessboard so that no two queens attack each other. That is, no two queens are allowed to be placed on the ...read more

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Find all Unique Subsets of a given Set

Last Updated: 23 July 2025

Given an array A[] of positive integers, print all the unique non-empty subsets of the array Note: The set can not contain duplicate elements, so any repeated subset shoul...read more

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Find K numbers in a given range [L, R] such that their bitwise XOR is X

Last Updated: 23 July 2025

Given four numbers L, R, K, and X, the task is to find K distinct decimal numbers in the range [L, R] such that their bitwise XOR is X.Note: If there are more than one pos...read more

Permutation and Combination

Find all even sum paths in given Binary Search Tree

Last Updated: 23 July 2025

Given a Binary search tree having N nodes, the task is to find all the paths starting at the root and ending at any leaf and having an even sum.Examples:Input:Img-BtreeOut...read more

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Binary Search Tree

Find X and Y from their sum, difference, product, division and remainder

Last Updated: 23 July 2025

Given arr[] of 5 integers denoting the values of X+Y, X−Y, X*Y, X%Y and ⌊X/Y⌋ in sorted order for two non-zero integers X and Y, the task is to find the value of X and Y.N...read more

Count of Subsets that can be partitioned into two non empty sets with equal Sum

Last Updated: 23 July 2025

Given an array Arr[] of size N, the task is to find the count of subsets of Arr[] that can be partitioned into two non-empty groups having equal sum.Examples:Input: Arr[] ...read more

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