GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Assignment 1 for course Artificial Intelligence.
Intelligently solves the classic wolf, goat, cabbage, farmer problem. Problem Description A wolf, a goat, a cabbage, and a farmer are on the west bank of a river and wish to cross to the east side, but only have a boat that can fit the farmer and one other thing.
The wolf will eat the goat if the farmer leaves them alone and the goat will eat the cabbage if left alone.
How can the farmer bring everything across to the east bank? This has been coded using python 2. Output is an array representing the current state. W means the thing is on the west back and E means the thing is on the East bank. The following positions represent the following things. Who would want to get in a boat with a wolf?
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Solution to Homework 6
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PJohnson - Apr 18 AM. Barnsite's Blog 17 Jun. Barnsite's Blog 01 Oct. Barnsite's Blog 12 Jun. Barnsite's Blog 01 Jun. Posted 06 October - PM. Posted 07 October - AM. So you need to create a program that does trial-and-error with rollback. So the logic the program has to execute is something like: Try moving cabbage fail roll back Try moving goat, try go back with goat fail, repeated position roll back, try going back without goat.
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Questions tagged [river-crossing-puzzle]
How do I set a breakpoint in an attached process in visual studio xarzu - Apr 04 AM. View All Updates. This topic has been archived. This means that you cannot reply to this topic.
The extend predicate is where I am seeing the issues.
When I run it on the first level, it works fine. Learn more. Asked 6 years, 1 month ago. Active 5 years, 10 months ago. Viewed 2k times. When I run it on the first level, it works fine,? Regards, Darian. It's extremely similar. DanielLyons - Thanks for the link, it was extremely helpful in finishing my program. Active Oldest Votes.Vdo oil pressure gauge troubleshooting
If I query your code I get? CapelliC CapelliC Thanks, this was the answer that got me passed my road block.
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Feedback on Q2 Community Roadmap. Technical site integration observational experiment live on Stack Overflow.River-Crossing Puzzles are a popular class of puzzles in the field of AI. Many flavours of these puzzles exist. Here we use R to provide a somewhat generic framework to model and solve these type of puzzles. River-crossing puzzles are a type of puzzle where the objective is to move a set of pieces objects, animals or people across a river, from one bank of the river to the opposite bank, using a boat or a bridge.
What makes these puzzles interesting are the set of rules and conditions that apply. Typically the boat is only able to carry a limited number of pieces at any one go. Once upon a time, there was a Farmer who had a tiny boat. The boat was so tiny that it could only take the Farmer himself and one additional passenger.
He wanted to move a Wolf, a Goat and a Cabbage across a river with his tiny boat.How to Solve It - Help Cannibals and Missionaries
When the Farmer is around, everyone is safe, the Wolf will not eat the Goat, the Goat will not eat the Cabbage. And of course he can only fit one more object with him on the boat either the Wolf, the Goat or the Cabbage.
The question is: How can he safely transport the three of them to the other side of the river? Solving river-crossing riddles entails starting with all pieces on one side of the river typically the left bank.Bpn untuk kakitangan awam masuk bila
This is the start state. Then one considers all possible valid moves that can be done given the start state. These possible moves create a set of new states. The process repeats itself with the new states until we eventually arrive at the goal statei.
To answer the above question we must build a graph of all possible valid moves. Thus we represent model the problem in terms of graph theory. Then we can apply a graph search algorithm to find all possible paths from the start node to the goal node, the shortest path smallest number of moves neededetc.
Puzzle | Farmer, Goat, Wolf and Cabbage
See the following video in order to apreciate the usefulness of this graph theoretic approach. And talking of graphs, the R language has some great packages for solving graph related problems and performing graph analytics. One such package that I have used a lot is igraph. And I will be using this package in this blog to provide a solution to the river-crossing problems. But before we start working on the solution, it is worthwhile remembering that River-Crossing puzzles come in many flavours and varieties.
This website lists many of these. For example, there is the Farmer-Fox-Chicken-Spider-Caterpillar-Lettuce puzzle where the farmer has to transfer 5 objects, but luckily for the farmer the boat is a bit larger can carry 3 pieces. There are variants where a particular piece is repeated.
Then there is the Japanese Family River-Crossing puzzle with its extremely complex rules. Also worth noting is the popular Missionaries-and-Cannibals problemfound in many AI text books. Actually river-crossing puzzles are in themselves just a subset of the class of wider puzzles called the Transport Puzzles. But this is beyond the scope here - we will just concentrate solely on river-crossing puzzles. Keeping the above in mind, I opted to try and write as generic a solution as much as possible.
We will codify the rules separately from the rest of the code.Amazon no longer under consideration
The rules and conditions that define the incompatibilites conflicts between the pieces can themselves be represented using a graph structure. For example in the Farmer-Wolf-Goat-Cabbage, the following graph encodes the rules:.
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It only takes a minute to sign up. A farmer has to cross a river with a wolf, a goat and a cabbage. He has a boat, but in the boat he can take just one thing. He cannot let the goat alone with the wolf or the goat with the cabbage. Ok So I know the two solutions and I arrived them with trial and error. Reaching dead ends and making smart moves. But I am interested to know the solution of this problem using Dijkstra's Algorithm. I do not know what my graph should represent and how to use the shortest path algorithm to solve this puzzle.
You can then apply Djikstra's algorithm as usual which is kind of silly, since the solution is obvious once you see the graph. I know this is old, but here's the answer formatted as a decision tree I made.
Note: the cabbage is not denoted as 'C', but 'L' since I did the problem with lettuce instead of cabbage for a school project. Sign up to join this community. The best answers are voted up and rise to the top.
Home Questions Tags Users Unanswered. Wolf cabbage and goat using dijkstra. Ask Question. Asked 5 years, 11 months ago. Active 2 years, 2 months ago. Viewed 8k times. What is the solution? Alvis Alvis 1 1 gold badge 6 6 silver badges 13 13 bronze badges. Active Oldest Votes. In this puzzle constructing a graph was trivial just the permutations. In a slightly different puzzle : We have a glass of 8 litre full of water and we have two empty glasses of 3 and 5 litre each.
We want to divide 8 litre equally in two glasses.Have you ever experienced software systems failing? Websites crash, calendar not synchronising, or even a power blackout. Of course you have! But did you know that many of these errors are the result of communication errors either within a system or between systems? Depending on the system, the impact of software failures can be huge, even resulting in massive economic damage or loss of lives. Software, and in particular the communication between software-intensive systems, is very complex and very difficult to get right.
System Validation helps you to design embedded system behaviour that is structurally sound. It also enforces you to make the behaviour simple and insightful; systems that are designed for sound behaviour are also much easier to maintain and adapt. System Validation is the field that studies the fundamentals of system communication and information processing. The techniques put forward in system validaton allow to prove the absence of errors. It discusses behavioural equivalences and illustrate these in a number of examples and quizzes.
This course explains labelled transition systems or automata to model behaviour for especially software controlled systems. An important question is when two behaviours represented by such automata are equal.
The answer to this question is not at all straightforward, but the resulting equivalences are used as powerful tools to simplify complex behaviour. This allows us to exactly investigate and understand the behavioural properties of such systems precisely. Especially, in the combination with hiding of behaviour, equivalence reduction is a unique technique to obtain insight in the behaviour of systems, far more effective than simulation or testing. Using this insight we can make the models correct.
Such models form an excellent basis for the production of concise, reliable and maintainable software. This course is part I of the set of courses for System Validation. I've learn more thing's in this course It allows automated analysis based on behavioural models of a system to see if a system works correctly. We want to guarantee that the systems does exactly what it is supposed to do.
It allows to design embedded system behaviour that is structurally sound and as a side effect enforces you to make the behaviour simple and insightful. This means that the systems are not only behaving correctly, but are also much easier to maintain and adapt.
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If nothing happens, download the GitHub extension for Visual Studio and try again. Assignment 1 for course Artificial Intelligence. Intelligently solves the classic wolf, goat, cabbage, farmer problem. Problem Description A wolf, a goat, a cabbage, and a farmer are on the west bank of a river and wish to cross to the east side, but only have a boat that can fit the farmer and one other thing. The wolf will eat the goat if the farmer leaves them alone and the goat will eat the cabbage if left alone.
How can the farmer bring everything across to the east bank? This has been coded using python 2. Output is an array representing the current state. W means the thing is on the west back and E means the thing is on the East bank. The following positions represent the following things. Who would want to get in a boat with a wolf? Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Sign up. Solution to the wolf goat cabbage farmer problem for a CS course in Artificial Intelligence. Python Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. AlCollins first commit. Latest commit ff Feb 5, How to run python wgcf.
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