The correct answer is 233168 but my code is returning 266333. The "sum += num" statement is Python short-hand for "sum = sum + num", since accumulating totals is such a frequently needed operation. Project Euler Problem 17 Python. GitHub - stevenprimeaux/python-project-euler Thus the body of the loop statement is indented under the "for" that introduces the loop. Project Euler Problem 17 Python - Stack Overflow 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. Euler 14 ---- 1. yield 2.BF 3. decorator 4.cache 5. def euler_problem_14(): 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. Some numbers (e.g. ), ( Since the "if" is inside the "for" loop, the accumulation of the sum is doubly indented. I'm just not sure how this is helpful to anyone else but the OP. What exactly makes a black hole STAY a black hole? But maybe when you are debugging, a print statement inside the loop would be a helpful addition. Description / Title. I am disappointed that there are no comments here as of 8/8/2019. python project-euler Updated Sep 13, 2022; Python . Solved Problems 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". Why does Python code run faster in a function? 32 commits Files Permalink . Latest commit . A bit of math would make this more more efficient. 5 It also has a built-in generator of a list of values. number 15, like bereal just told). ), ( 2022/10/30 Problem 63 Project Euler6170 60 taq.hatenadiary.jp projecteuler.net Problem 61 -Prime pair sets- Problem 62 -Cubic permutations- Problem 63 . Link to the original question. Then we could take the sum of that list to get the desired answer. \(1^2+2^2++10^2=385.\) Stack Overflow for Teams is moving to its own domain! 45 commits. Asking for help, clarification, or responding to other answers. 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. It says you have to sum numbers that are multiples of 3 OR 5, not exactly one of them. Hopefully giving you a few tips along the way.Check out some of my other Video tutorials and subscribe if you li. 30358907296290491560440772390713810515859307960866 And a lot of people have already publicly accepted the challenge. 6 . 16427171479924442928230863465674813919123162824586 rev2022.11.3.43005. ), ( ManishBhat/Project-Euler-solutions-in-Python - GitHub What is the best way to show results of a multiple-choice quiz where multiple options may be right? Find the sum of all the multiples of 3 or 5 below 1000. 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. Thank you for this! sefi-roee Fix typo at p&p 613. Having kids in grad school while both parents do PhDs. It is much more efficiently coded than another Project Euler #1 code question I just read. Not the answer you're looking for? Thanks for Sharing..Python Course in Noida. 83972241375657056057490261407972968652414535100474 15 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. Value of counter = 1. Project Euler in Python Series 1 - Starcoder 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. 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. ), ( To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I think you should leave out another check of divisible of both number (eg. What is the effect of cycling on weight loss? In this video, we'll solve Problem 1 from Project Euler. It is possible to make 2 in the following way: 11 + 150p + 220p + 15p + 12p + 31p Asking for help, clarification, or responding to other answers. Nici qid: Top 3 Produkte unter der Lupe! just explain the issue and move on, like the previous commenters. ), ( Find the sum of all the primes below two million. You can take the iterative approach: O(n), Or you can compute it mathematically: O(1). Modified 9 months ago. MathJax reference. ), ( Why does the sentence uses a question form, but it is put a period in the end? I'll not reveal the numeric answer here, so please learn how to run this yourself. 82166370484403199890008895243450658541227588666881 Agree, the break jumps out of the inner (for) loop only. 70172427121883998797908792274921901699720888093776 Does activating the pump in a vacuum chamber produce movement of the air inside? '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. 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. 1. The most glaring magic is how do we really decide if a given number, which we've named "num", is "interesting"? 3 project-euler GitHub Topics GitHub Why is my Project Euler problem #1 code returning the wrong result? Project Euler -Problem 61~70- - GitHub - atakanargn/Project-Euler-with-Python: Problem's solutions at Not the answer you're looking for? Asking for help, clarification, or responding to other answers. This branch is up to date with sefi-roee/ProjectEuler:master. p = a + b + c. p = a + b + a2+b2. ), ( 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. You are adding 15, 30, 45, etc. There is however a mathematical solution that takes constant time. 52584907711670556013604839586446706324415722155397 70172427121883998797908792274921901699720888093776 7 years ago. Why does it matter that a group of January 6 rioters went to Olive Garden for dinner after the riot? You are missing the numbers that are divisible by both 3 and 5 (or 15). 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. Solution Obvious solution Solving Project Euler Problem no.1 (Python) - Stack Overflow Its either not a factor (if) or a factor and < num (second elif). Good Post. Can "it's down to him to fix the machine" and "it's up to him to fix the machine"? ), ( Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. ), ( 29265e4 on Apr 18, 2019. 5 Connect and share knowledge within a single location that is structured and easy to search. Why do people write #!/usr/bin/env python on the first line of a Python script? Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum. Project Euler Problem 12 in Python - Code Review Stack Exchange The initialization of sum to zero is outside of the "for" loop so it isn't indented at all. 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. 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. The sum of these multiples is 23. Find centralized, trusted content and collaborate around the technologies you use most. To learn more, see our tips on writing great answers. 62229893423380308135336276614282806444486645238749 47 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. no need to be condescending. 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. List comprehensions and generator expressions. 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. I am attempting to do Project Euler problem #2. kotlin java project-euler algorithms . How do I concatenate two lists in Python? 6 Is a planet-sized magnet a good interstellar weapon? 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. The sum of these multiples is 23."). 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. But we want to know if the number is divisible by 3 or is divisible by 5. Problem 1 Multiples of 3 and 5. 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. Your solution includes numbers that are multiples of both 3 and 5, twice. 16 Problem 3: Find the largest prime factor of 317584931803. The body of the "then" clause that is made conditional by the "if" statement is indented inside the "if". 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Thanks for contributing an answer to Stack Overflow! 66896648950445244523161731856403098711121722383113 rev2022.11.3.43005. It only takes a minute to sign up. 2 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. 05886116467109405077541002256983155200055935729725 The sum of these multiples is 23. The sum of these multiples is 23. Add eu528. A challenge that will expand your computer science and math knowledge - all while giving you a ton of programming practice. 14 ID. 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. The problem description of Problem 2 of Project Euler reads. Is there a trick for softening butter quickly? 84580156166097919133875499200524063689912560717606 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. How can I get a huge Saturn-like ringed moon in the sky? To learn more, see our tips on writing great answers. 16 . In Python 2, "range" is a built-in function to return a list of integers, but such a list takes up space. The correct answer is 233168 but my code is returning 266333. 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"). By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The sum of the squares of the first ten natural numbers is. Transformer 220/380/440 V 24 V explanation. For example, we could loop through all the non-negative integers <1000 and build up a list of the numbers that meet the criteria of being "interesting". Let us list the factors of the first seven triangle numbers: 1: 1 3: 1,3 52584907711670556013604839586446706324415722155397 I was wrong with the answer of 200003. p = 2a. Python-based Project Euler command line tool. 16427171479924442928230863465674813919123162824586 By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, . Find the thirteen adjacent digits in the 1000-digit number that have the greatest product. GitHub - ishandutta2007/ProjectEuler-2: Solutions for "Project Euler Horror story: only people who smoke could see some monsters. 17866458359124566529476545682848912883142607690042 How to solve Project Euler Problem 1 using Python. The mistake is obvious, you miss numbers that are multiples of both 3 and 5, like 15,30 and so on. In a similar way we will progress as follows: 3 10 5 16 8 4 2. CopyRight 2022 cskitty. 73167176531330624919225119674426574742355349194934 Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is \(3025385=2640.\). 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. Project Euler & HackerRank Problem 1 Solution - Dreamshire Some of them, if you are sufficiently adroit mathematically, can be solved on the back of an envelope. That's deeply disappointing. 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. What is Project Euler ? 1) Multiples of 3 and. Find the sum of all the multiples of 3 or 5 below 1000. 29 By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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 . Find the product abc. 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. 7 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? The sum of these multiples is 23. The. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. To learn more, see our tips on writing great answers. Together with the sum() built-in function and a generator expression, that becomes: Your approach, if cast as a set problem, is fine too: Both approaches still loop and thus will take more time as the numbers grow. 2 Should we burninate the [variations] tag? 05886116467109405077541002256983155200055935729725 82166370484403199890008895243450658541227588666881 Most of them clearly need a piece of software to grind through the calculations. 12 12540698747158523863050715693290963295227443043557 LWC: Lightning datatable not displaying the data stored in localstorage, How to distinguish it-cleft and extraposition? ), ( 4 ), ( ("If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. Ask Question Asked 11 years, 6 months ago. Problem 14 Project Euler Solution with python - Blogger Correct handling of negative chapter numbers. Math hint #4: every number that is divideable by an odd number is an odd number itself (so you can skip half of the loop iterations). 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. Does Python have a ternary conditional operator? 85861560789112949495459501737958331952853208805511 8 ), ( How to upgrade all Python packages with pip? ), ( So just say range(1000) to conceptually whip a list of numbers 0 through 999. There's more than one way to do it. A Pythagorean triplet is a set of three natural numbers, a < b < c, for which. rev2022.11.3.43005. python - Project Euler Problem 1 - Code Review Stack Exchange 53697817977846174064955149290862569321978468622482 All rights reserved. Problem 2: Find the sum of all the even-valued terms in the Fibonacci sequence which do not exceed one million. There was a problem preparing your codespace, please try again. Is there a 3rd degree irreducible polynomial over Q[x], such that two of it's roots' (over C[x]) product equals the third root? The square of the sum of the first ten natural numbers is, \((1+2++10)^2=55^2=3025.\) Now if we will consider b = 0 then. ), ( Your test explicitly retains numbers divisible by 3 but not 5, and divisible by 5 but not 3. Does Python have a string 'contains' substring method? Regex: Delete all lines before STRING, except one particular line, Non-anthropic, universal units of time for active SETI. 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. Find the sum of all the multiples of 3 or 5 below 1000. Is cycling an aerobic or anaerobic exercise? So no need to worry about negative 3 and negative 5 and so on. How to alter this code to allow appending to the list? I speculate that in doing away with Google+ earlier this year. Published on 05 October 2001 at 06:00 pm [Server Time] If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. What is the effect of cycling on weight loss? 9 71636269561882670428252483600823257530420752963450. Problem 1. ), ( 45 By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I like your solution to the problem. Is it OK to check indirectly in a Bash if statement for exit codes if they are multiple? 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. Which is: Each new term in the Fibonacci sequence is generated by adding the previous two terms. The sum of these multiples is 23. The sum of the multiple of 3 (or 5 or 15) below 1000 is the sum of an arithmetic progression. At this stage the first if statement will get executed and the size of two is added to the chain. Solving Project Euler #2 in Python - Stack Overflow 47 date - Project Euler #19, Python - Stack Overflow 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?? 35 The "print" statement is also not indented. Project Euler in Python Series 1. Does squeezing out liquid from shredded potatoes significantly reduce cook time? Project Euler Problem 1 Python - YouTube GitHub - ishandutta2007/ProjectEuler-1: Each directory contains Python Can "it's down to him to fix the machine" and "it's up to him to fix the machine"? p = a + 0 + a. If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. ), ( Thanks for contributing an answer to Code Review Stack Exchange! If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. 7 "Loop like a native". False if the remainder is not 0). 07198403850962455444362981230987879927244284909188 Might as well be simply, @Tomerikoo: the majority of this class of questions are very specific to the code shown. Connect and share knowledge within a single location that is structured and easy to search.