Crossword program java

A few seconds seems a bit optimistic for brute force for input data of that size. A back-tracking approach seems better than brute force, but even with back-tracking you are searching through a potentially enormous tree. Backtracking might be a good start. The next more powerful approaches are probably SAT-solvers ugly transformation needed and Constraint-programming easier to formulate.

The latter can benefit from powerful global-constraints. For brute force, you can possibly just copy the code from Recursive backtracking in Java for solving a crossword there's a link to a presumably working complete program in the comments.

Show 5 more comments. Active Oldest Votes. The basic idea you have is pretty sensible: Identify slots on the board. Try each slot with each word that fits. If every slots can be filled without conflict, it is solved. The gist of it, as explained by other answers, is recursion : 1 Draw a slot from the slot pool. Revert put the slot back and go back. Below is a short but complete example that I cooked up from your requirements.

Key points: Use a formatter to fit the code to your style. The 2D board is stored in a linear character array in row-major order. This allow the board to be save by clone and restored by arraycopy. On creation, the board is scanned for slots in two passes from two directions. The two slot lists are solved by the same loop, differ mainly in how the slots are filled. The recur process is displayed, so you can see how it works.

Many assumptions are made. No single letter slot, all words in same case, board is correct etc. Be patient. Learn whatever is new and give yourself time to absorb it. Source: import java. Point; import java. BiFunction; import java. Supplier; import java. When all slots of this kind are filled successfully, run next stage. If recur success, done! Return false if there is a conflict. Improve this answer.

Sheepy Sheepy Add a comment. Also, a quick search on scholar reveals a good number of papers on the topic that you might want to take a look at, such as the followings: using genetic algorithm using a probabilistic approach.

Davide Spataro Davide Spataro 6, 1 1 gold badge 21 21 silver badges 36 36 bronze badges. So your best chance is to solve it by bruteforce".

That doesn't make a lot of sense. The travelling salesman problem is NP-complete but there are algorithms in existence which are much better than brute-force even though asymptotically they are still exponential.

Yes I know, I did not want to say that bruteforcing is the only way to solve the problem. By "your best chance" I meant that a simple backtracking would be correct and farily easy to implement since she's asking for help on SO I assumed that would be a good starting point.

Good point though, Thanks. Well, they are only better than brute-force in a non-general setting with additional assumptions. This happened to me before and this is the reason I decided to launch this website, so that all visitors can find what they are looking for!

This website is for informational purposes only. Sitemap Contact. Home Crossword Clues Small Java program…. Tags: Small Java program crossword clue. Carl Elias Carl Elias is a game aficionado who has turned his passion into a full-time job. Improve Article. Save Article. Like Article. A 10 x 10 Crossword grid is provided, along with a set of words or names of places which need to be filled into the grid.

You are also given an array of words that need to be filled in Crossword grid. Recommended Articles. Puzzle Connect 9 circles each arranged at center of a Matrix using 3 straight lines. Article Contributed By :.