Given a positive number N, find all combinations of 2*N elements such that every element from 1 to N appears exactly twice and distance between its two appearances is exactly equal to value of the element.
Given a string containing all distinct characters, find all permutations of it.
Given a binary pattern that contains ‘?’ wildcard character at few positions, find all possible combinations of binary strings that can be formed by replacing the wildcard character by either 0 or 1.
Find the total number of unique paths which the robot can take in a given maze to reach the destination from given source.
Given a N x N matrix of positive integers, find a path from the first cell of the matrix to its last cell.
Given a rectangular path in the form of binary matrix, find the length of longest possible route from source to destination position of the matrix by moving to only non-zero adjacent positions i.e. route can be formed from positions having their value as 1. Note there should not be any cycles in the output path.
Given a maze in the form of the binary rectangular matrix, find length of the shortest path in maze from given source to given destination. The path can only be constructed out of cells having value 1 and at any given moment, we can only move one step in one of the four directions.
We are given set of bipolar magnets each domino-shaped. The objective is to place magnets on a M X N board which should meet a set of conditions where both N and M are not odd.
The N queens puzzle is the problem of placing N chess queens on an N × N chessboard so that no two queens threaten each other. Thus, a solution requires that no two queens share the same row, column, or diagonal.