I don't think anyone finds what I'm working on interesting. You saved me a lot of trouble :) and thanks for the tip regarding indentation. What should I do? *An integer B where B=0 indicates the boat is on the left island and B=1 indicates the boat is on the right island. What is the best way to show results of a multiple-choice quiz where multiple options may be right? If nothing happens, download Xcode and try again. It's possible to increase that limit, but with correct logic your DFS should not need to recurse that deeply (unless you have a huge number of missionaries & cannibals). Does squeezing out liquid from shredded potatoes significantly reduce cook time? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Why are only 2 out of the 3 boosters on Falcon Heavy reused? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Asking for help, clarification, or responding to other answers. Please fix your indentation. Before you paste it make sure there's an empty line. Making statements based on opinion; back them up with references or personal experience. The agents subset of available actions are determined based off the application of the problems current state.The agents action include more cannibals/missionaries than available on the current side and cannot perform an action that would result in a state where the missionaries are outnumbered. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. didn't solve this because it's never the same root object (even if the root.state.missionaries, cannibals and boat are the same value), so I changed this using a dictionary object: This results in the following code (it returns an answer, I'm not sure if it's the correct one because I don't know the missionaries and cannibals problem), PS. Is my answer unclear? This can easily be fixed by making visited a global variable (by putting it in front of the def main() as done in the final solution), 2: The program was searching possibilities that weren't going to ever help (eg: bringing the same guy back and forth), this. This was my first time asking on stack overflow and I struggled with fixing my indentation. Use Git or checkout with SVN using the web URL. We can check whether or not a given state is the goal state by checking the amount of missionaries and cannibals on the left side. Here is the code: 1: your list 'visited' didn't properly keep track of all the states. How are we doing? How can i extract files in the directory where they're located with the find command? How do I make kelp elevator without drowning? Horror story: only people who smoke could see some monsters. What is the maximum recursion depth in Python, and how to increase it? rev2022.11.3.43004. However I keep getting this error: Are you sure you want to create this branch? I have written a python code to solve the missionaries and cannibals problem using recursive dfs in python. Description of BFS, DFS, GFS, and A* algorithm in python to solve the Missionaries and cannibals problem. *An array R of size 2, where R[0] is the number of missionaries on the right island and R[1] is the number of cannibals on the right island. Find centralized, trusted content and collaborate around the technologies you use most. We can't tell what your code actually does if the indentation is wrong. A tag already exists with the provided branch name. Is there a topology on the reals such that the continuous functions of that topology are precisely the differentiable functions? What value for LANG should I use for "sort -u correctly handle Chinese characters? The act of moving the boat = 1, path cost is # of times boat moves across the river, therefore the path cost is equal to the number of actions from the initial state to the goal state. Python: maximum recursion depth exceeded while calling a Python object, Maximum recursion depth exceeded when finding the depth of binary-search-tree. Work fast with our official CLI. The actions available to the agent are based upon the current position of the boat and the distribution of cannibals and missionaries. River Crossing (Toy Problem) solved using Breadth First Search. What's a good single chain ring size for a 7s 12-28 cassette for better hill climbing? You signed in with another tab or window. I have no idea what to do about it, and I have been stuck at it for so long. Usage Run mc.py Find a way to transport everyone to the other side of the river, without ever By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Found footage movie where teens get superpowers after getting struck by lightning? Thanks a lot! Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Stack Overflow for Teams is moving to its own domain! Please help us improve Stack Overflow. We can't tell what your code actually does if the indentation is wrong. leaving a group of Missionaries in one place outnumbered by the Cannibals in Python's default recursion depth is 1000. *An array L of size 2, where L[0] is the number of missionaries on the left island and L[1] is the number of cannibals on the left island that place. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. Question: In the missionaries and cannibals problem, three missionaries and three cannibals must cross a river using a boat which can carry at most two people, under the constraint that, for both banks, if there are missionaries present on the bank, they cannot be outnumbered by cannibals (if they were, the cannibals would eat the missionaries). Three cannibals and three missionaries are on the left island along with the boat. Thanks for contributing an answer to Stack Overflow! 2022 Moderator Election Q&A Question Collection. We can verify this by checking n(L[0]) = 0 and n(L[1]) = 0. thanks a lot Nathan! Connect and share knowledge within a single location that is structured and easy to search. Is there a trick for softening butter quickly? There was a problem preparing your codespace, please try again. Should we burninate the [variations] tag? What is a good way to make an abstract board game truly alien? that can hold one or two passengers. I prefer women who cook good food, who speak three languages, and who go mountain hiking - what if it is a woman who only has one of the attributes? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. To learn more, see our tips on writing great answers. The next state is determined by the current state: (# of cannibals/missionaries on left, # of cannibals/missionaries on right, and the position of the boat in) and the action (combination of passengers to take). Not the answer you're looking for? Please fix your indentation. Move boat across the river with 1 missionary, 1 cannibal, Move boat across the river with 2 missionaries, Move boat across the river with 2 cannibals, Move boat across the river with 1 missionary, Move boat across the river with 1 cannibal. If so, what do you need help with? Math papers where the only issue is that someone else could've done it but didn't, Employer made me redundant, then retracted the notice after realising that I'm about to start on a new project, Finding features that intersect QgsRectangle but are not equal to themselves using PyQGIS. Can an autistic person with difficulty making eye contact survive in the workplace? You can do this by selecting all your code, adding a tab to all lines selected and then copying it. missionaries-and-cannibals Problem Description 3 Missionaries and 3 Cannibals are on one side of a river, along with a boat that can hold one or two passengers. How to draw a grid of grids-with-polygons? Thanks. The boat that carries the missionaries and or cannibals from one island to the other. Any help or suggestion will be life saving for me. If nothing happens, download GitHub Desktop and try again. RecursionError: maximum recursion depth exceeded. Python's default recursion depth is 1000. :). The goal of the problem is to move all missionaries and cannibals from the left island to the right island. If there are 0 missionaries and 0 cannibals on the left island, then they must be on the right island therefore fulfilling the requirements of the problem. Maximum recursion depth exceeded in dfs using recursion in python, Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Find a way to transport everyone to the other side of the river, without ever leaving a group of Missionaries in one place outnumbered by the Cannibals in that place. The state of the program can be represented by: How can a GPS receiver estimate position faster than the worst case 12.5 min it takes to get ionospheric model parameters? 3 Missionaries and 3 Cannibals are on one side of a river, along with a boat It's possible to increase that limit, but with correct logic your DFS should. as @PM 2Ring said, for next time: please fix your indentation when asking questions, it makes reading your code easier to understand. Learn more. Will make sure to fix it properly in future.
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