Background I’ve implemented a sudoku-solver algorithm (backtracking) that looks like this: This solution is working fine (it can solve sudokus). What I try to achieve I now want to achieve that the algorithm tells me, whether there is only one solution or more solutions. What I’ve tried I tried to…
Tag: backtracking
Knight tour problem – order of moves affect performance
I was trying to implement a solution for knight tour problem. I faced an interesting issue. I would like to know the reason for the behavior. This is the code – it works fine. Now we could run this, starting with knight position as (2, 2) in the matrix When i tried to run the starting position as (0, 0)
Given n and k, return the kth permutation sequence
The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order, We get the following sequence (ie, for n = 3 ) : “123” “132” “213” “231” “312” “321” Given n and k, return the kth p…
Knights tour – results in an infinite loop and i can’t figure out why
I’m trying to solve the knight’s tour problem using backtracking. I think the algorithm I have should work. I’ve tried but I can’t figure out why it isn’t working. It results in an infinite loop. However if I comment out the line that back track solutionBoard[dst.x][dst.y]=-1; it…
Why is this called backtracking?
I have read in Wikipedia and have also Googled it, but I cannot figure out what “Backtracking Algorithm” means. I saw this solution from “Cracking the Code Interviews” and wonder why is this a backtracking algorithm? Answer “Backtracking” is a term that occurs in enumeratin…
StackOverflowError when running my “Knight’s Tour” (it’s pretty much finished otherwise)
I’m trying to make a program that goes through all squares of a chessboard (size doesn’t really matter, but for now it’s 6×6) with a knight, called a “Knight’s Tour” check it out on wiki. The tour is supposed to be closed, which means the knight on the last visited squ…