Solved Problems Stack Overflow for Teams is moving to its own domain! 1. Does squeezing out liquid from shredded potatoes significantly reduce cook time? 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. 1) Multiples of 3 and. @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. Generators. 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'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. What exactly makes a black hole STAY a black hole? 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". The best answers are voted up and rise to the top, Not the answer you're looking for? Programming looks ok, but logic fails. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 6 Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Find the sum of all the multiples of 3 or 5 below 1000. What exactly makes a black hole STAY a black hole? Why so many wires in my old light fixture? 4 6 Add eu528. To learn more, see our tips on writing great answers. In this video, we'll solve Problem 1 from Project Euler. just explain the issue and move on, like the previous commenters. Best way to get consistent results when baking a purposely underbaked mud cake. 71636269561882670428252483600823257530420752963450""". The sum of these multiples is 23."). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 7 The initialization of sum to zero is outside of the "for" loop so it isn't indented at all. Why is SQL Server setup recommending MAXDOP 8 here? Asking for help, clarification, or responding to other answers. Problem 2: Find the sum of all the even-valued terms in the Fibonacci sequence which do not exceed one million. python project-euler offline euler-solutions euler-offline Updated Aug 5, 2019; Python; husaynhakeem / Algorithms-Playground Star 25. How to constrain regression coefficients to be proportional. 24219022671055626321111109370544217506941658960408 Had I misunderstood the question or are there any bugs in my code? Find the product abc. 65727333001053367881220235421809751254540594752243 12 To learn more, see our tips on writing great answers. A tag already exists with the provided branch name. I like your blog. Find the sum of all the multiples of 3 or 5 below 1000. 52584907711670556013604839586446706324415722155397 Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. ), ( Manually raising (throwing) an exception in Python. 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. 17866458359124566529476545682848912883142607690042 ), ( (x/3)*3 == x. Python-based Project Euler command line tool. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. What is the deepest Stockfish evaluation of the standard initial position that has ever been done? 1. If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + 4 . 7 Find the sum of all the multiples of 3 or 5 below 1000. There is however a mathematical solution that takes constant time. The crux of problem 1 is: Find the sum of all the multiples of 3 or 5 below 1000. GitHub - ishandutta2007/ProjectEuler-2: Solutions for "Project Euler Project Euler Problem 17 Python. Connect and share knowledge within a single location that is structured and easy to search. euler. 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)) That's deeply disappointing. Asking for help, clarification, or responding to other answers. It says you have to sum numbers that are multiples of 3 OR 5, not exactly one of them. 07198403850962455444362981230987879927244284909188 The first ten terms would be: 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, . 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. 12540698747158523863050715693290963295227443043557 62229893423380308135336276614282806444486645238749 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. False if the remainder is not 0). 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. Contribute. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 2022 Moderator Election Q&A Question Collection. Thus the body of the loop statement is indented under the "for" that introduces the loop. 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. 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. Problem 1. Happily, Python has an "or" operator that will let us combine 2 True/False values in exactly the way we need. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, What about numbers that are multiples of 15? 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, Find the sum of all the multiples of 3 or 5 below 1000. 05886116467109405077541002256983155200055935729725 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. Thank you for this! Does squeezing out liquid from shredded potatoes significantly reduce cook time? What is the effect of cycling on weight loss? Is cycling an aerobic or anaerobic exercise? Change your condition to fit that. 53697817977846174064955149290862569321978468622482 \(1^2+2^2++10^2=385.\) 3 By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. A bit of math would make this more more efficient. Git stats. 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. 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. ), ( number 15, like bereal just told). List comprehensions and generator expressions. If you would like to tackle the 10 most recently published problems, go to Recent problems. Problem 14 Project Euler Solution with python - Blogger 70172427121883998797908792274921901699720888093776 Introducing The #ProjectEuler100 Challenge: the "Dark Souls" of Coding Python Project Euler - 1 , 2 , 3 , 4 - YouTube So now our pseudo-code has morphed into runnable Python code: And we're done, except for running the code to get the answer. that Google has nuked away the comments here. So, I'm going to stick with my initial proposal which in Python-like pseudo-code looks like this: Note that in Python, indentation is used to delineate the blocks of code. project-euler GitHub Topics GitHub Then we could take the sum of that list to get the desired answer. Stack Overflow for Teams is moving to its own domain! Find the sum of all the multiples of 3 or 5 below 1000. The one "guideline" is that a good solution should need no more than a minute of time on your computer. 66896648950445244523161731856403098711121722383113 The sum of the squares of the first ten natural numbers is. Transformer 220/380/440 V 24 V explanation. "Loop like a native". Why is my Project Euler problem #1 code returning the wrong result? 30358907296290491560440772390713810515859307960866 07198403850962455444362981230987879927244284909188 12 ), ( ), ( Not the answer you're looking for? You can take the iterative approach: O(n), Or you can compute it mathematically: O(1). Find the largest palindrome made from the product of two 3-digit numbers. It only takes a minute to sign up. Does activating the pump in a vacuum chamber produce movement of the air inside? 7 years ago. ), ( Can "it's down to him to fix the machine" and "it's up to him to fix the machine"? Some of them, if you are sufficiently adroit mathematically, can be solved on the back of an envelope. ), ( Euler_problem_14 for python - PythonTechWorld ), ( 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. 16 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. date - Project Euler #19, Python - Stack Overflow 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. Regex: Delete all lines before STRING, except one particular line, Non-anthropic, universal units of time for active SETI. ), ( How do I concatenate two lists in Python? The sum of these multiples is 23. 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. TeX - Wikipedia 73167176531330624919225119674426574742355349194934 A challenge that will expand your computer science and math knowledge - all while giving you a ton of programming practice. GitHub - atakanargn/Project-Euler-with-Python: Problem's solutions at I'll not reveal the numeric answer here, so please learn how to run this yourself. 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. Your solution includes numbers that are multiples of both 3 and 5, twice. The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. In a similar way we will progress as follows: 3 10 5 16 8 4 2. 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). The question. ). ), ( A tag already exists with the provided branch name. Most of them clearly need a piece of software to grind through the calculations. I think you should leave out another check of divisible of both number (eg. There exists exactly one Pythagorean triplet for which a + b + c = 1000. 82166370484403199890008895243450658541227588666881 ), ( A Pythagorean triplet is a set of three natural numbers, a < b < c, for which. Find centralized, trusted content and collaborate around the technologies you use most. This program is going to need an iteration (loop) to consider all the natural numbers less than 1000. 2 Project Euler -Problem 61~70- - Having kids in grad school while both parents do PhDs. The sum of these multiples is 23. Problem 3: Find the largest prime factor of 317584931803. xrange worked well enough and explaining the distinction between range and xrange was ugly enough that in Python 3, xrange became range and you only need to know its a generator if you're interested in the details of how stuff works. 62229893423380308135336276614282806444486645238749 The problems archives table shows problems 1 to 804. ), ( '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. It's called #ProjectEuler100. Making statements based on opinion; back them up with references or personal experience. Ask Question Asked 11 years, 6 months ago. ID. The challenge is named after Leonhard Euler, one of the most prolific mathematicians in history. like 'lets play' but with more code Slightly more advanced python doing some number problems from ProjectEuler. What is the largest prime factor of the number 600851475143 ? I like your solution to the problem. 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. It is much more efficiently coded than another Project Euler #1 code question I just read. Project Euler 31 Solution - Dreamshire Read the question. Why do people write #!/usr/bin/env python on the first line of a Python script? 85861560789112949495459501737958331952853208805511 28 Atom Can "it's down to him to fix the machine" and "it's up to him to fix the machine"? no need to be condescending. 65727333001053367881220235421809751254540594752243 You are adding 15, 30, 45, etc. The prime factors of 13195 are 5, 7, 13 and 29. Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum. Contribute to ManishBhat/Project-Euler-solutions-in-Python development by creating an account on GitHub. Solutions to Project Euler problems in Python. Why don't we consider drain-bulk voltage instead of source-bulk voltage in body effect? 82166370484403199890008895243450658541227588666881 Nici qid: Top 3 Produkte unter der Lupe! By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. ), ( Find the thirteen adjacent digits in the 1000-digit number that have the greatest product. 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). If your solution needs way more time than that, then you should look for a better solution. So no need to worry about negative 3 and negative 5 and so on. 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". What is the effect of cycling on weight loss? The most glaring magic is how do we really decide if a given number, which we've named "num", is "interesting"? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. 45 Let us list the factors of the first seven triangle numbers: 1: 1 3: 1,3 Solving Project Euler Problem no.1 (Python) - Stack Overflow The four adjacent digits in the 1000-digit number that have the greatest product are 9 9 8 9 = 5832. 24219022671055626321111109370544217506941658960408 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. 05886116467109405077541002256983155200055935729725 8 Is there a trick for softening butter quickly? 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?? ), ( it's not obvious to the OP. If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. Project Euler in Python - Python Awesome Find the sum of all the primes below two million. ), Post Comments How do I access environment variables in Python? 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. Use MathJax to format equations. How to alter this code to allow appending to the list? You are missing the numbers that are divisible by both 3 and 5 (or 15). Help with Python Project Euler Question 5 - The Student Room The correct answer is 233168 but my code is returning 266333. 5 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? 15 The sum of these multiples is 23. Project Euler in Python Series 1 - Starcoder rev2022.11.3.43005. Is cycling an aerobic or anaerobic exercise? 2 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. It is possible to make 2 in the following way: 11 + 150p + 220p + 15p + 12p + 31p 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? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 83972241375657056057490261407972968652414535100474 29 How to solve Project Euler Problem 1 using Python. You also completely fail to address the question stated by the OP: what is wrong with their attempt at a solution. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. ), ( Modified 9 months ago. Problem Archives. Two surfaces in a 4-manifold whose algebraic intersection number is zero, Horror story: only people who smoke could see some monsters. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, . 30358907296290491560440772390713810515859307960866 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. Stack Overflow for Teams is moving to its own domain! But we want to know if the number is divisible by 3 or is divisible by 5. How can we create psychedelic experiences for healthy people without drugs? Viewed 21k times 1 Please let me know how to bug fix this code . To learn more, see our tips on writing great answers. The number you've counted twice are the multiple of 15. Found footage movie where teens get superpowers after getting struck by lightning? The "sum += num" statement is Python short-hand for "sum = sum + num", since accumulating totals is such a frequently needed operation. At this stage the first if statement will get executed and the size of two is added to the chain. A palindromic number reads the same both ways. Description / Title. Does Python have a string 'contains' substring method? 71636269561882670428252483600823257530420752963450. The. I'm trying to do Project Euler Problem 12, which reads as: The sequence of triangle numbers is generated by adding the natural numbers. ), ( Link to the original question. That would be done by adding another print statement and indenting it so it is inside the loop. p = 2a. Project Euler Problem 17 Python - Stack Overflow Find centralized, trusted content and collaborate around the technologies you use most. ( twice to the final sum: Your solution can be fixed by testing if b is already present in numArray: The simpler solution is to just loop from 0 to 999 and test each number with the % modulus operator; if the outcome is 0, the left-hand side number is divisible by the right-hand side argument. 9 Is there a trick for softening butter quickly? How can I remove a key from a Python dictionary? Thanks for contributing an answer to Stack Overflow! 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"). How can we create psychedelic experiences for healthy people without drugs? p = a + b + c. p = a + b + a2+b2. Connect and share knowledge within a single location that is structured and easy to search. I am disappointed that there are no comments here as of 8/8/2019. Multiples of 3 or 5. 12540698747158523863050715693290963295227443043557 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 The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 99. It also has a built-in generator of a list of values. Go to file. 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. Each new term in the Fibonacci sequence is generated by adding the previous two terms. Does Python have a ternary conditional operator? You should use the datetime library, which will handled all the leap year information automatically: from datetime import date from collections import Counter counter = Counter () for year in xrange (1901, 2001): for month in xrange (1, 13): day = date (year, month, 1) counter [day.weekday ()] += 1 print counter [6] Share. Should we burninate the [variations] tag? 83972241375657056057490261407972968652414535100474 Thanks for Sharing..Python Course in Noida. Mystified? 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. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 45 commits. Not the answer you're looking for? Chucking it through a debugger would make this clear. python - Project Euler Problem 1 - Code Review Stack Exchange Find the sum of all the multiples of 3 or 5 below 1000. 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). 53697817977846174064955149290862569321978468622482 Making statements based on opinion; back them up with references or personal experience. Connect and share knowledge within a single location that is structured and easy to search. How do I delete a file or folder in Python? Problem 1 Multiples of 3 and 5. Euler 14 ---- 1. yield 2.BF 3. decorator 4.cache 5. def euler_problem_14(): What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? 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. I'll show you two solutions using a for loop and a while loop. The square of the sum of the first ten natural numbers is, \((1+2++10)^2=55^2=3025.\) 17866458359124566529476545682848912883142607690042 14 Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is \(3025385=2640.\). The sum of these multiples is 23. ), ( 16427171479924442928230863465674813919123162824586 ), ( By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. Project Euler Problem 1 Python - YouTube 32 commits Files Permalink . Latest commit . By the way, this is the problem: Find the sum of all the multiples of 3 or 5 below 1000. There's more than one way to do it. All rights reserved. So the 7th triangle number would be 1 + 2 + 3 + 4 + 5 + 6 + 7 = 28. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. TeX is a popular means of typesetting complex mathematical formulae; it has been noted as one of the most sophisticated digital typographical systems. Why does the sentence uses a question form, but it is put a period in the end? Your test explicitly retains numbers divisible by 3 but not 5, and divisible by 5 but not 3. I'll show you two solutions using a for loop and a while loop.
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