project euler problem 1 pythoncoursera learner support team

My Python-like pseudo-code follows that same convention. MathJax reference. Stack Overflow for Teams is moving to its own domain! If you want to read more about looping in Python, especially if you are comfortable with looping in other languages, I strongly recommend Ned Batchelder's blog post Thank you for this! . 3 The sum of the multiple of 3 (or 5 or 15) below 1000 is the sum of an arithmetic progression. What is a good way to make an abstract board game truly alien? 15) are multiples of both 3 and of 5, but only should get added into the sum for this problem once, How to upgrade all Python packages with pip? 82166370484403199890008895243450658541227588666881 Asking for help, clarification, or responding to other answers. 30358907296290491560440772390713810515859307960866 If you tell us in the comments on this blogpost what editor or IDE ("Integrated Development Environment") you prefer, it may influence whether I write future articles addressing that editor or IDE. The initialization of sum to zero is outside of the "for" loop so it isn't indented at all. There's more than one way to do it. Your test explicitly retains numbers divisible by 3 but not 5, and divisible by 5 but not 3. like 'lets play' but with more code Slightly more advanced python doing some number problems from ProjectEuler. 12 ), ( Regex: Delete all lines before STRING, except one particular line, Non-anthropic, universal units of time for active SETI. Project Euler 31: In England the currency is made up of pound, , and pence, p, and there are eight coins in general circulation: 1p, 2p, 5p, 10p, 20p, 50p, 1 (100p) and 2 (200p). So no need to worry about negative 3 and negative 5 and so on. The OP always breaks out of the for loop for the first x (=2). ), ( By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. How can I remove a key from a Python dictionary? 29 Euler 14 ---- 1. yield 2.BF 3. decorator 4.cache 5. def euler_problem_14(): number 15, like bereal just told). Project Euler Problem 1 Statement If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. Contribute to ManishBhat/Project-Euler-solutions-in-Python development by creating an account on GitHub. 07198403850962455444362981230987879927244284909188 I tried and correct a lot of things , but I am 10 extra to the solution ! Problem 1 Multiples of 3 and 5. You also completely fail to address the question stated by the OP: what is wrong with their attempt at a solution. I'm just not sure how this is helpful to anyone else but the OP. In other words, if f(x, n) calculates the total sum of all multiples of x below n, then the solution to Euler #1 is equal to f(3, 1000) + f(5, 1000) - f(3 * 5, 1000). Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell. rev2022.11.3.43005. ). Your solution includes numbers that are multiples of both 3 and 5, twice. Why is SQL Server setup recommending MAXDOP 8 here? I got an answer from ProjectEuler forum where Augustingianni from Argentina on Saturday 4 August 2007 posted the following: We know that the value of c can be written as a2+b2. And a lot of people have already publicly accepted the challenge. Value of counter = 1. 82166370484403199890008895243450658541227588666881 Stack Overflow for Teams is moving to its own domain! 1 python project-euler offline euler-solutions euler-offline Updated Aug 5, 2019; Python; husaynhakeem / Algorithms-Playground Star 25. Find the sum of all the multiples of 3 or 5 below 1000. But we want to know if the number is divisible by 3 or is divisible by 5. 83972241375657056057490261407972968652414535100474 In this video, I'll show you how to find multiples of 3 or 5 in Python.Colab File: https://colab.research.. It says you have to sum numbers that are multiples of 3 OR 5, not exactly one of them. Git stats. So the perimeter of can be written as. Thanks for contributing an answer to Stack Overflow! Can "it's down to him to fix the machine" and "it's up to him to fix the machine"? Random Walks straying a bit from the Lamppost. Is cycling an aerobic or anaerobic exercise? A tag already exists with the provided branch name. Use MathJax to format equations. Asking for help, clarification, or responding to other answers. Latest commit . I like your solution to the problem. It's called #ProjectEuler100. The crux of problem 1 is: Find the sum of all the multiples of 3 or 5 below 1000. ), ( 45 ), ( Good Post. ), Post Comments To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How can I get a huge Saturn-like ringed moon in the sky? If your solution needs way more time than that, then you should look for a better solution. According to the rules of Project Euler, it is only allowed to share the solutions to the first 100 exercises in a informative manner online. Employer made me redundant, then retracted the notice after realising that I'm about to start on a new project. Solution Obvious solution Best way to get consistent results when baking a purposely underbaked mud cake. 4 ), ( ), ( I'm not looking to use a different method, I'm wondering why this code isn't working as is, from the debugging that I did it looks as everything that I am expecting to see is there. 2022 Moderator Election Q&A Question Collection. 8 Is it OK to check indirectly in a Bash if statement for exit codes if they are multiple? The most glaring magic is how do we really decide if a given number, which we've named "num", is "interesting"? The problem description of Problem 2 of Project Euler reads. The correct answer is 233168 but my code is returning 266333. 969240. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company. Does Python have a string 'contains' substring method? (x/3)*3 == x. 2022/10/30 Problem 63 Project Euler6170 60 taq.hatenadiary.jp projecteuler.net Problem 61 -Prime pair sets- Problem 62 -Cubic permutations- Problem 63 . Got another plausible shape for the solution this problem? 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. When it says "3 or 5", it's using the plain English meaning of inclusive-or (aka and/or), not an exclusive-or ("one or the other but not both"). Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Transformer 220/380/440 V 24 V explanation. How do I concatenate two lists in Python? Connect and share knowledge within a single location that is structured and easy to search. If you would like to tackle the 10 most recently published problems, go to Recent problems. What is the effect of cycling on weight loss? I like your blog. What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? Add eu528. TeX is a popular means of typesetting complex mathematical formulae; it has been noted as one of the most sophisticated digital typographical systems. A bit of math would make this more more efficient. Generators. There was a problem preparing your codespace, please try again. It also has a built-in generator of a list of values. Check solutions for Problem Euler problems while offline. sefi-roee Fix typo at p&p 613. Is MATLAB command "fourier" only applicable for continous-time signals or is it also applicable for discrete-time signals? I speculate that in doing away with Google+ earlier this year. Does activating the pump in a vacuum chamber produce movement of the air inside? And for the numbers that are multiples of 3 or 5, we'll need a little arithmetic to accumulate the sum of the selected numbers. What exactly makes a black hole STAY a black hole? The sum of these multiples is 23. Stack Overflow for Teams is moving to its own domain! 05886116467109405077541002256983155200055935729725 Problem 1 Project Euler, which asks you to find the sum of all multiples of 3 or 5 below 1000, so 3 + 5 + 6 + 9, etc. ), ( I'll not reveal the numeric answer here, so please learn how to run this yourself. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, . 05886116467109405077541002256983155200055935729725 7 So "xrange" was introduced to return a generator that'll provide the desired sequence of integer values on demand without ever actually creating the list as a whole in memory. Might as well be simply, @Tomerikoo: the majority of this class of questions are very specific to the code shown. but I find that long expression a bit hard to read, so I added some un-necessary parentheses to make it easier for a human to parse. ), ( Find the sum of all the multiples of 3 or 5 below 1000. The sum of these multiples is 23."). The square of the sum of the first ten natural numbers is, \((1+2++10)^2=55^2=3025.\) 70172427121883998797908792274921901699720888093776 Viewed 21k times 1 Please let me know how to bug fix this code . Another approach would be to generate the multiples of 3 and to generate the multiples of 5 that are less then 1000, and then tally up the generated lists, but you'd need to be careful not to include any numbers twice. 24219022671055626321111109370544217506941658960408 euler. Problem 1 Project Euler, which asks you to find the sum of all multiples of 3 or 5 below 1000, so 3 + 5 + 6 + 9, etc. that Google has nuked away the comments here. 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. 96983520312774506326239578318016984801869478851843 ), ( Correct handling of negative chapter numbers, Horror story: only people who smoke could see some monsters, Book where a girl living with an older relative discovers she's a robot, Having kids in grad school while both parents do PhDs, Best way to get consistent results when baking a purposely underbaked mud cake. Solved By. 35 The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the thirteen adjacent digits in the 1000-digit number that have the greatest product. Please tell me if I've confused you so I can polish things up before my next blog post. This program is going to need an iteration (loop) to consider all the natural numbers less than 1000. Project Euler in Python In this repository I collect and document my solutions to the famous set of mathematical challenges found at https://projecteuler.net. Find the sum of all the multiples of 3 or 5 below 1000. Each new term in the Fibonacci sequence is generated by adding the previous two terms. Is cycling an aerobic or anaerobic exercise? ( Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, What about numbers that are multiples of 15? Connect and share knowledge within a single location that is structured and easy to search. Hopefully giving you a few tips along the way.Check out some of my other Video tutorials and subscribe if you li. ), ( Find the largest palindrome made from the product of two 3-digit numbers. The sum of these multiples is 23. So the 7th triangle number would be 1 + 2 + 3 + 4 + 5 + 6 + 7 = 28. 6 62229893423380308135336276614282806444486645238749 It only takes a minute to sign up. Problem Archives. But we have no further use for the list in this problem, so I assert it is simpler to just accumulate the sum as we go. If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. I was wrong with the answer of 200003. 15 A palindromic number reads the same both ways. It is much more efficiently coded than another Project Euler #1 code question I just read. You might want to include a comment on your debugging code so you can trim the debugging code out when your program is in good working order. I feel silly, I was testing it with the example of 10 and getting the result that they got and got very confused when it got to higher numbers. 12 52584907711670556013604839586446706324415722155397 To learn more, see our tips on writing great answers. Why does comparing strings using either '==' or 'is' sometimes produce a different result? Go to file. 47 So just say range(1000) to conceptually whip a list of numbers 0 through 999. 16 Python-based Project Euler command line tool. ), ( 7 years ago. ( ), ( Should we burninate the [variations] tag? Solving Project Euler Problem no.1 (Python) Ask Question 2 If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. How can we create psychedelic experiences for healthy people without drugs? 85861560789112949495459501737958331952853208805511 16427171479924442928230863465674813919123162824586 How to alter this code to allow appending to the list? 32 commits Files Permalink . Then we could take the sum of that list to get the desired answer. 85861560789112949495459501737958331952853208805511 CopyRight 2022 cskitty. Note that your 'bug' hints at a possible path; if the sum of all multiples of 3 and multiples of 5 below 1000 was off by the sum of all multiples of (3 times 5 == 15) below 1000, then if you have a simple formula to calculate the sum of any multiple of x below n then you can calculate the solution to this problem by adding the sums for 3 and 5 and subtracting the sum for 15. The sum of these multiples is 23. I am disappointed that there are no comments here as of 8/8/2019. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. So if we have a number to test named num, then we can test if num is a multiple of 3 by using this Python code: The result of that test expression is a True or False value (True if the remainder is 0. 24219022671055626321111109370544217506941658960408 Euler 14 ---- 1. yield 2.BF 3. decorator 4.cache 5. def euler_problem_14(): What is the best way to show results of a multiple-choice quiz where multiple options may be right? Just me working through problem 1 in Python. Project Euler in Python Series 1. What is the largest prime factor of the number 600851475143 ? This is my python solution to the first problem on Project Euler: I would like to find a way to keep everything in this python code to as little number of lines as possible (maybe even a one liner?? 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. 17866458359124566529476545682848912883142607690042 I'm trying to do Project Euler Problem 12, which reads as: The sequence of triangle numbers is generated by adding the natural numbers. I'll show you two solutions using a for loop and a while loop. The sum of these multiples is 23. Its either not a factor (if) or a factor and < num (second elif). 1. Most of them clearly need a piece of software to grind through the calculations. Is there a trick for softening butter quickly? Find centralized, trusted content and collaborate around the technologies you use most. 3 Solved Problems 71636269561882670428252483600823257530420752963450""". Two surfaces in a 4-manifold whose algebraic intersection number is zero, Math papers where the only issue is that someone else could've done it but didn't. Read the question. Correct handling of negative chapter numbers. You are adding 15, 30, 45, etc. ("If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. In order to bruteforce the first problem, we need to iterate over all the numbers from one to 1000, and we need a way to check if the number we are checking is divisible by 3 and/or 5. Project Euler Problem 1 - In Python Project Euler Project Euler is a web site with hundreds of problems for you to tackle however you want to solve them. I am working my way through Project Euler, and I just used this code to solve Problem #7, where it is asking to find the 10,001st prime number: # prime number only has two factors num = 2 factor_list = [] prime_list = [] go = True while go: for factor in range (1, num + 1): if num % factor == 0: factor_list.append (factor) if factor == num: if . ), ( By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, Find the sum of all the even-valued terms in the sequence which do not exceed four million. But if you were to convert the sizes to the chain then your chain will be as follows: 3 10 5 16 8 4 2 2 1. The sum of all the multiples of 3 or 5 below 1000 is really the sum of (the sum of all the multiples of 3 below 1000) plus (the sum of all the multiples of 5 below 1000) minus the numbers you've counted twice. 53697817977846174064955149290862569321978468622482 I hope you've noticed that the pseudo-code is not quite working python, so we aren't done yet. That's deeply disappointing. TeX (/ t x /, see below), stylized within the system as T e X, is a typesetting system which was designed and written by computer scientist and Stanford University professor Donald Knuth and first released in 1978. ), ( Multiples of 3 or 5. ), ( Find the sum of all the multiples of 3 or 5 below 1000. 73167176531330624919225119674426574742355349194934 Solutions to the first 40 problems in functional Python Problem 1: Add all the natural numbers below 1000 that are multiples of 3 or 5. The question. ), and possibly improve the speed (it's currently around 12 ms). What is the effect of cycling on weight loss? How to constrain regression coefficients to be proportional. You are missing the numbers that are divisible by both 3 and 5 (or 15). 28 What is the deepest Stockfish evaluation of the standard initial position that has ever been done? 47 7 71636269561882670428252483600823257530420752963450. Employer made me redundant, then retracted the notice after realising that I'm about to start on a new project, What does puncturing in cryptography mean, Iterate through addition of number sequence until a single digit. And inside that loop it is going to need a conditional statement (if statement) to select the numbers that are multiples of 3 or of 5 (which for whatever reason are the numbers that this problem considers to be interesting). Why is my Project Euler problem #1 code returning the wrong result? Connect and share knowledge within a single location that is structured and easy to search. 16427171479924442928230863465674813919123162824586 The problems archives table shows problems 1 to 804. Why is SQL Server setup recommending MAXDOP 8 here? But maybe when you are debugging, a print statement inside the loop would be a helpful addition. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. "Loop like a native". Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is \(3025385=2640.\). 12540698747158523863050715693290963295227443043557 If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + 4 . It is possible to make 2 in the following way: 11 + 150p + 220p + 15p + 12p + 31p How do I access environment variables in Python? You can take the iterative approach: O(n), Or you can compute it mathematically: O(1). Answer: ), ( Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems. A Pythagorean triplet is a set of three natural numbers, a < b < c, for which. I'll show you two solutions using a for loop and a while loop. @Lewis, 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, Solving Project Euler problem #48 in Scala, Please review my solution to Project Euler program 1, Project Euler #1 Sum of multiples of 3 and 5 python implementation, (Project Euler #1) Find the sum of all the multiples of 3 or 5 below 1000, next step on music theory as a guitar player. Not the answer you're looking for? Found footage movie where teens get superpowers after getting struck by lightning? Change your condition to fit that. 1 62229893423380308135336276614282806444486645238749 ), ( Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. The challenge is named after Leonhard Euler, one of the most prolific mathematicians in history. 65727333001053367881220235421809751254540594752243 Problem 3: Find the largest prime factor of 317584931803. Find the sum of all the multiples of 3 or 5 below 1000. If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. See . A tag already exists with the provided branch name. Now if we will consider b = 0 then. This branch is up to date with sefi-roee/ProjectEuler:master. Why so many wires in my old light fixture? ), ( How to solve Project Euler Problem 1 using Python. Problem 2: Find the sum of all the even-valued terms in the Fibonacci sequence which do not exceed one million. There is however a mathematical solution that takes constant time. Python hint number 1: The pythonic way to do : n = 1 while n < 1000: # something using n n = n + 1 is : for n in range (1,1000): # something using n Python hint number 2: You could make your code a one-liner by using list comprehension/generators : print sum (n for n in range (1,1000) if (n%3==0 or n%5==0)) The "sum += num" statement is Python short-hand for "sum = sum + num", since accumulating totals is such a frequently needed operation. Which is: Each new term in the Fibonacci sequence is generated by adding the previous two terms. The sum of the squares of the first ten natural numbers is. Ask Question Asked 11 years, 6 months ago. So now our pseudo-code has morphed into runnable Python code: And we're done, except for running the code to get the answer. The best answers are voted up and rise to the top, Not the answer you're looking for? p = a + 0 + a. How do I delete a file or folder in Python? Making statements based on opinion; back them up with references or personal experience. LWC: Lightning datatable not displaying the data stored in localstorage, How to distinguish it-cleft and extraposition? The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 99. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. That would be done by adding another print statement and indenting it so it is inside the loop. The first ten terms would be: 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, . Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum. 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? Since the "if" is inside the "for" loop, the accumulation of the sum is doubly indented. We don't want to print the partial sum on each iteration of the loop, so it is important not to indent that final "print". Some numbers (e.g. The prime factors of 13195 are 5, 7, 13 and 29. 84580156166097919133875499200524063689912560717606 83972241375657056057490261407972968652414535100474 It'd be useful if you figure out a good way to prepare your Python programs in a file, but you can start with notepad or whatever simple editor you are most comfortable with. Chucking it through a debugger would make this clear. 6 'It was Ben that found it' v 'It was clear that Ben found it', Non-anthropic, universal units of time for active SETI, Replacing outdoor electrical box at end of conduit, Fourier transform of a functional derivative, What does puncturing in cryptography mean. 84580156166097919133875499200524063689912560717606 Is a planet-sized magnet a good interstellar weapon? Project Euler Problem 17 Python. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, @MartijnPieters Well your edit certainly clarifies what the code is expected to do. Does squeezing out liquid from shredded potatoes significantly reduce cook time? The. ), ( 29265e4 on Apr 18, 2019. ), ( Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Why does it matter that a group of January 6 rioters went to Olive Garden for dinner after the riot? Making statements based on opinion; back them up with references or personal experience. In this video, we'll solve Problem 1 from Project Euler. rev2022.11.3.43005. To learn more, see our tips on writing great answers. ), ( Solving Project Euler Problem no.1 (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. Each new term in the Fibonacci sequence is generated by adding the previous two terms. . The example given makes clear that they are only asking us to consider positive integers. I am attempting to do Project Euler problem #2. There exists exactly one Pythagorean triplet for which a + b + c = 1000. no need to be condescending. You could make your code a one-liner by using list comprehension/generators : Your code works fine but if instead of 1000, it was a much bigger number, the computation would take much longer. What is the value of this product? If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. A challenge that will expand your computer science and math knowledge - all while giving you a ton of programming practice. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Here's a copy/paste of my PC anywhere session where I tried this out: As you can see, the Python rules for operator precedence did exactly the right thing for us here, Why does Python code run faster in a function? What is Project Euler ? Problem 1. Find the sum of all the multiples of 3 or 5 below 1000. 16 Asking for help, clarification, or responding to other answers. In a similar way we will progress as follows: 3 10 5 16 8 4 2. My code is inefficent, multiples of 3 and 5 from Project Euler but with a 10 second timeout conditon, Trying to go through all the multiples of 5 under 1000 with a while loop in Python. The sum of these multiples is 23. The body of the "then" clause that is made conditional by the "if" statement is indented inside the "if". 66896648950445244523161731856403098711121722383113 What exactly makes a black hole STAY a black hole? so I assert it is simpler to just consider each of the candidate numbers and accumulate the ones that meet the criteria for being interesting. Should we burninate the [variations] tag? Is there a trick for softening butter quickly? In this case, f is the triangular number of the divisor of n over x, and x: giving you a straight, linear time outcome: You only need one variable to store the summed up value, starting at 0: Martin's last example is obviously the most efficient. 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