Project euler 24. Project Euler, ftw! If you solve the first 50–100 Project Euler problems you will: Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Project euler 24

 
 Project Euler, ftw! If you solve the first 50–100 Project Euler problems you will: Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solveProject euler 24  By replacing each of the letters in the word CARE with 1, 2, 9, and 6 respectively, we form a square number: 1296 = 36^ (2)

preludetoruin. Find the sum of all numbers which are equal to the sum of the factorial of their digits. First, generate four million pseudo-random numbers using a specific form of what is known as a "Lagged Fibonacci Generator": For 1 ≤ k ≤ 55. Problem 54 isn't clear. 1. Python 2. For each of these steps I have to check whether enough neighbor exist. Benchmark. Try it out. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 -DORIGINAL ) See here for a comparison of all solutions. Easy Max Score: 100 Success Rate: 93. Consider the number 15. Benchmark. net, it’s website that provides problems that. add all fifth powers of these digits. To get started with problem 1, we first need a loop that will iterate over every number from 0 to 1000 (This is because Project Euler problem 1 states we want to find all of the multiples of 3 or 5 below 100. int. 2. I propose we create them in a separate category called Project Euler Problems, but give. The problem with trying to learn to program by using Project Euler is that Project Euler is much more about the algorithm than it is the coding part. Cho đến tháng 7 năm 2023, Project Euler có hơn 840 bài. The motivation for starting Project. 12 would fit the bill. 2 days ago · Euler Network (EUL), a project with revolutionary potential, hopes to. “Project Euler exists to encourage, challenge, and develop the skills and enjoyment of anyone with an interest in the fascinating world of. 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. The correct solution to the original Project Euler problem was found in 0. never form a "running crack". append (the_word) return perm def perm (string): "Find all permutations of given string. Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Extended to solve all test cases for HackerRank Project Euler 24. Runs for 1,409,343 iterations. 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. 40GHz. 3. Learn to Code — For FreeDuring this time Project Euler will be taken offline and the website will not be accessible. Improve your writing skills in 5 minutes a day with the Daily Writing Tips email newsletter. If you are experiencing a technical issue, then you can contact Project Euler by . NOTE: If you have forgotten your password, we are unable to help recover accounts if you have signed in at. Project Euler #10: Summation of primes. from Project Euler with Python 3 Max Halford Project Euler is a good way to learn basic number theory, to get your imagination going and to learn a new programming language. The problem: —. 980797. IVL - Project Euler Solutions. There are a couple differences that may make it harder in other respects, though. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"hackerrank","path":"hackerrank","contentType":"submodule","submoduleUrl":null. The correct solution to the original Project Euler problem was found in less than 0. Two Pairs: Two different pairs. 1. Euler Network's ongoing presale. permutations ( [x for x in range (0,10)], 10)) [999999] Using your brain way: We can sort of count permutations, we know the first permutation is 0123456789, and we know that for the first 9! permutations 0 will be the first digit, so when looking for. // As stated in the problem, 1 = 1! and 2 = 2! are excluded. Multiples of 3 or 5. Starting with the number 1 and moving to the right in a clockwise direction a 5 by 5 spiral is formed as follows: It can be verified that the sum of the numbers on the diagonals is 101. Project Euler #345: Max sum matrix with unique path. Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Project Euler 54: In the card game poker, a hand consists of five cards and are ranked, from lowest to highest, in the following way: High Card: Highest value card. (Java Solution) Project Euler > Problem 177 > Integer angled Quadrilaterals. Each new term in the Fibonacci sequence is generated by adding the previous two terms. Find the sum of all numbers below which divide the sum of the factorial of their digits. What is remarkable is that, by using the same digital substitutions, the anagram, RACE, also forms a square number: 9216 = 96^ (2). (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . Cheating way: Using itertools module this problem is reduced to a one-liner. Benchmark. 2. Find the largest palindrome made from the product of two 3-digit numbers. ID. \$\begingroup\$ Minor correction to your assertion "Floating-point division, using the / instead of the // operator, is even slower". GitHub community articles. The objective of Su Doku puzzles, however, is to replace the blanks (or zeros) in a 9 by 9. 40GHz. R","path":"Poker_hand__text_matrix. The link you provided leads to some repository in FCC github profile. Problem 67: Maximum path sum II. Project Euler Problem 4 – Largest Palindrome Product. Output: best horizontal : 48477312 = 78 x 78 x 96 x 83 best vertical : 51267216 = 66 x 91 x 88 x 97 best topleft-bottomright : 40304286 = 94 x 99 x 71 x 61 best bottomleft-topright : 70600674 = 87 x 97 x 94 x 89. A permutation is an ordered arrangement of objects. Written By Ritika Trikha | May 1, 2015 Last weekend, HackerRank hosted. 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. The solutions provided in this repository can be found for the respective challenges on the HackerRank Project Euler+ page. I think everyone here assumed that the solution for these are Fibonacci (6*n + 3)/2,but those are not the only solutions. net/problem=24 ) A permutation is an ordered arrangement of objects. I just finished Project Euler problem 9 (warning spoilers ): A Pythagorean triplet is a set of three natural numbers, a < b < c, for which, a^2 + b^2 = c^2 For example, 3^2 + 4^2 = 9 + 16 = 25 = 5^2. Solve Challenge. admit8490 September 12, 2022, 2:35pm 2. Introduction Last week, I achieved a goal of hitting 200 problems solved in Project Euler. Benchmark. A permutation is an ordered arrangement of objects. 11 seconds on an Intel® Core™ i7-2600K CPU @ 3. Since we need to minimize the n/φ (n), the prime factors of n should be large and the number of them should be as small as possible. The algorithm. 05 seconds on an Intel® Core™ i7-2600K CPU @ 3. $endgroup$ – user2336315. range implicitly takes 0 as its first argument, so range (0, 20) and range (20) are equivalent. I solved the question in 1 min 32 seconds which is a lot. cpp. 1,188 7 8. After which all normal services should resume. 166666. The correct solution to the original Project Euler problem was found in less than 0. I am not sure if it is relevant to this Euler problem. The motivation for starting Project. This solution contains 8 empty lines, 9 comments and 2 preprocessor commands. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . Summing everything The correct solution to the original Project Euler problem was found in less than 0. For example, 3124 is one. Perhaps less well known is 169, in that it produces the longest chain of numbers that link back to 169; it turns out that there are only three such loops that exist: 169 → 363601 → 1454. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":". 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. 02 seconds on an Intel® Core™ i7-2600K CPU @ 3. 1. Three by three; 2. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . This solution contains 16 empty lines, 24 comments and 2 preprocessor commands. 22 seconds on an Intel® Core™ i7-2600K CPU @ 3. e. This was my idea. gitignore","path. Project Euler RStats. The motivation for starting Project. Learn to Code — For Free. Benchmark. Topics Trending Collections Pricing. HackerRank version. Add this topic to your repo. Problem 24. gitignore","contentType":"file"},{"name":"A1paper_4. You can solve them however you want to solve them, I personally did my solutions in code because I was trying to learn Ruby. For example, 3124 is one possible permutation of the digits 1, 2, 3 and 4. First, a a standard prime sieve finds all prime numbers up to our limit (1000000 by default) and keeps them in a std::set. Problem 23. Project Euler # 24 Lexicographic permutations in Python. Here we'll discuss, analyze, and code a solution for Project Euler #24: Lexicographic Permutations. brash • 12 yr. Benchmark. This website is one of the largest collections of explained Project Euler Solutions, not just code, but detailed explanations of the mathematics and coding , with as many interactive tests as possible, to help anyone in need in their Project Euler journey! Furthermore, this website is also, largely, my personal. Peak memory usage was about 20 MByte. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . The correct solution to the original Project Euler problem was found in less than 0. 05 seconds on an Intel® Core™ i7-2600K CPU @ 3. " GitHub is where people build software. The function E_116 () has two parameters i = number of black coloured square tiles covered by the new coloured (red, green or blue) tiles and k = total number of black coloured square tiles. Solved By. The correct solution to the original Project Euler problem was found in less than 0. The number 6 can be written as a palindromic sum in exactly eight different ways: (1,1,1,1,1,1), (1,1,2,1,1), (1,2,2,1), (1,4,1), (2,1,1,2), (2,2,2), (3,3), (6) We shall define a twopal to be a palindromic tuple having at least one element with a value of 2. Mimino solved ALL 78 Project Euler challenges in under 24 hours, at a rate of about 18 minutes per problem! How Mimino tackled the Project Euler challenges. What is the index of the first term in the Fibonacci sequence to contain 1000 digits? Problem 34. 02 seconds on an Intel® Core™ i7-2600K CPU @ 3. Project Euler Steven Miller ([email protected]. Use this link to get the Project Euler 87 Solution Python 2. 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. 2. 2. WASM Specific. For example, 3124 is one possible permutation of the digits 1, 2, 3 and 4. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . 0. Find ∑ gcd ( k, k ′) for 1 < k ≤ 5 × 10 15. It’s a lovely day. 2. Project Euler (projecteuler. Note: gcd ( x, y) denotes the greatest common divisor of x and y. Find the sum of all numbers which are equal to the sum of the factorial of their digits. How many circular primes are there below one million?1. 40GHz. In the fast-evolving landscape of cryptocurrency, Euler Network. 6&percnt; at Project Euler and I scored 13526 points (out of 15700 possible points, top rank was 17 out of &approx;60000 in August 2017) at Hackerrank's Project Euler+ . 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. 40GHz. system Closed March 14, 2023, 2:36am 3. Easy Max Score: 100 Success Rate: 93. Not all numbers produce palindromes so quickly. E. Project Euler isn't fond of discussing problems on public forums like StackOverflow. Solved By. What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?" And I'm wondering if my code to solve this problem is good and if there are ways to make it better. Use this link to get the Project Euler 44 Solution Python 2. * 2. const unsigned int factorials[] = { 1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880 }; // no more than 7*9! = 2540160 for the original problem: unsigned int limit; std. Euler Network's ongoing presale success, securing an impressive $3 million in just 24 hours without relying on celebrity hype, underscores its potential to disrupt the status quo. Add a minimal testing framework to your projects and write tests before you write the solution. 40GHz. 1. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum total from top to bottom is 23. Project Euler - Rust. However, when n = 40, 402 + 40 + 41 = 40 (40 + 1) + 41 is divisible by 41, and certainly when n = 41, 41² + 41 + 41 is clearly divisible by 41. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 -DORIGINAL )My Algorithm. . You are missing the numbers that are divisible by both 3 and 5 (or 15) – Diogenis Siganos. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 -DORIGINAL ) See here for a comparison of all solutions. The code in this repository is cross-portabel for MATLAB and for Octave. 40GHz. 8 seconds on an Intel® Core™ i7-2600K CPU @ 3. If you would like to tackle the 10 most recently published problems, go to Recent problems. I solved the question in 1 min 32 seconds which is a lot. To associate your repository with the projecteuler-solutions topic, visit your repo's landing page and select "manage topics. Friends - Project Euler - #24 Lexicographic Permutations - Project Euler * E — C!1 X ' Logged 'assahil200495597 iject Elller H, mm 2323 01:53 3* Q A About Recent Progress Account News Friends Statistics 4- -&gt; Lexicographic Permutations Problem 24 f é: a A permutation is an ordered arrangement of objects. These challenges are creative-commons licensed, and as long as we attribute them, we can repurpose them. This solution contains 7 empty lines, 10 comments and 2 preprocessor commands. Su Doku (Japanese meaning number place) is the name given to a popular puzzle concept. current cell and its three neighbors going right and down. Euler Network’s Presale Prowess: A Unique Approach Euler Network,. 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 palindromic number reads the same both ways. How to solve this problem 710 of Project-Euler. The correct solution to the original Project Euler problem was found in 0. Medium Max Score: 100 Success Rate: 66. The correct solution to the original Project Euler problem was found in 0. Since its creation in 2001 by Colin Hughes, Project Euler has gained notability and popularity worldwide. 18. Add a comment. Link to the challenge: freecodecamp. Title. 40GHz. emergency account recovery key, then you can use it to recover your account. and am supposed to "Find the thirteen adjacent digits in the 1000-digit number that have the greatest product. 1 day ago · Euler Network’s Strategic Edge. py. 5 + 1. 40GHz. net) is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. This solution contains 16 empty lines, 26 comments and 2 preprocessor commands. 1. The decimal representation of the unit fractions with denominators 2 to 10 are given: 1/3 = 0. 08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 0849 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62. Project Euler+ is a series of challenging mathematical and computational programming problems hosted on HackerRank. Project Euler 1 is. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 -DORIGINAL) Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":". freeCodeCamp. 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. Project Euler; Project Euler Problems 1 to 100; Problem 18: Maximum path sum I. The motivation for starting Project. 3 + 3 + 2 + 2. Created January 23, 2023 08:09. p ′ = 1 for any prime p. Benchmark. It can be seen that 1 / 7 has a 6-digit recurring cycle. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . For example, 3124 is one possible permutation of the digits 1, 2, 3 and 4. In this video, I will be coding the solution for the problem # 24- Lexicographic Permutations. gitignore","contentType":"file"},{"name":"001. 3, project Euler. This solution contains 19 empty lines, 21 comments and 2 preprocessor commands. 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. 5 seconds on an Intel® Core™ i7-2600K CPU @ 3. That is, 3 + 7 + 4 + 9 = 23. It can be simplifed to 40!/20!^2. Straight: All cards are consecutive values. Show 2 more comments. 40GHz. 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. A permutation is an ordered arrangement of objects. AnythingApplied • 12 yr. During the weekend of Friday 24 September 2021, Project Euler is moving to a new server. Project Euler ( projecteuler. " EG the product of the first four adjacent digits is 7 * 3 * 1 * 6. R","contentType":"file"},{"name. 40 GHz, 64-bit CPU running Windows 7, 8 GB RAM, Enthought python ). 6% at Project Euler and. Contribute to muratcorlu/euler development by creating an account on GitHub. gitignore","path":". 1. Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. It was created by Colin Hughes in 2001 and has since become a popular platform for individuals to test and improve their mathematical and programming abilities. Straight: All cards are consecutive values. Project Euler 87 Solution Runs 0. At each step, the ant moves to an adjacent square at random, without leaving the grid; thus there are 2, 3 or 4 possible moves at each step depending on the ant's position. So Ive been working on project Euler problem #650, and it generates the correct answer for smaller values, but they are looking for the solution to values up to 20,000. Benchmark. 2 and 3. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . Numbers in JS are only i32 or f32; Notes. 01 seconds on an Intel® Core™ i7-2600K CPU @ 3. Leaderboard. An another approach might be to stop the looping once you have found out the solution, because it is given in the question that there is only one such solution. One Pair: Two cards of the same value. 40GHz. Even Fibonacci Numbers. This solution contains 13 empty lines, 16 comments and 7 preprocessor commands. " GitHub is where people build software. ahmettasoglu5549 / Project Euler 24. The Rust Programming Language;The correct solution to the original Project Euler problem was found in 0. Hello I'm experiencing some problems with how python is handling my permutations algorithm. 1] recur :: Int -> Int -> [Int] -> [Int] recur x y arr | y > 1 = arr !! d : recur r (y-1. Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. A permutation is an ordered arrangement of objects. Project Euler 55: If we take 47, reverse and add, 47 + 74 = 121, which is palindromic. 1. Project Euler (đặt tên theo nhà toán học Leonhard Euler) là một trang web giải bài trực tuyến. D=92821 for D ≤ 100000 in 15 seconds. Another great opportunity with Project Euler is to learn unit testing. This solution contains 8 empty lines, 10 comments and 2 preprocessor commands. Project Euler is a website dedicated to a series of computational problems intended to be solved with computer programs. It is a common recreational problem to make a target number using a selection of other numbers. Tests. Find the largest palindrome made from the product of two n -digit numbers. 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. The key observation in this algorithm is that when we want to compute the next permutation, we must “increase” the sequence as little as possible. Clarifications on Project Euler Problems. In this video I present some basic theorems on permutations and use them to solve Project Euler problem #24A challenge that will expand your computer science and math knowledge – all while giving you a ton of programming practice. Since Project Euler problems are now fair game for questions I have a question of my own. 7 source. 3x3 or 4x4 to show how the value should be computed. I'm working on project euler problem number eight, in which ive been supplied this ridiculously large number: . edu) (*For this problem we could go through and keep track of the multiples of 3 and 5 and add. However, 6 is not divisible by 4. The correct solution to the original Project Euler problem was found in less than 0. Run tests: cargo run test --workspace. The correct solution to the original Project Euler problem was found in 0. Problem 34 Project Euler Solution with Python May 14, 2016 Digit factorials. 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. Brute forcing Project Euler problems almost never works and you have to come up with an elegant algorithm to solve it in a reasonable time. if you check Fibonacci series, for even numbers 2 8 34 144 610 you can see that there is a fantastic relation between even numbers, for example: 34 = 4*8 + 2, 144 = 34*4 + 8, 610 = 144*4 + 34; this means that next even in Fibonacci can be expressed like below. programming project-euler challenges mathematical-programming Updated Jul 19,. Project Euler Steven Miller (sjm1@williams. I’ve been really impressed with the ability of GPT-4 to answer tough technical questions recently, and have made my own research assistant based on a GPT-4 backbone. Find the sum of all numbers which are equal to the sum of the factorial of their digits. We can also use the formula that the sum of the first n integers is n n+1 2. Benchmark. For those of you who don’t know, Project Euler is a series of challenging mathematical/computer programming problems. g. diagonal_reverse (grid, run_len) ¶. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"hackerrank","path":"hackerrank","contentType":"submodule","submoduleUrl":null. Euler Network’s Strategic Edge. Problem 280: Ant and seeds. 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. 40GHz. digital import digits_of from lib. A number n is called deficient if the sum of its proper divisors is less than n and it is called abundant. 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. Problem 1: Multiples of 3 or 5 2. The motivation for starting Project. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . Problem 74. Peak memory usage was about 6 MByte. Problem 280: Ant and seeds. by jotd » Wed Feb 23, 2011 8:58 pm. It's a similar project, but less focused on math. Benchmark. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Project Euler #10: Summation of primes. The number 145 is well known for the property that the sum of the factorial of its digits is equal to 145: 1! + 4! + 5! = 1 + 24 + 120 = 145. 7. Even Fibonacci Numbers. key point. As a. ago. The sum of these multiples is 23. These are ordered arrangements of objects in lexicographic order. group-theory; project-euler; A little mouse on the pampas. Get Help. Perhaps less well known is 169, in that it produces the longest chain of numbers that link back to 169; it turns out that there are only three such loops that exist: 169 → 363601 → 1454 → 169. 32 bit int DIV/IDIV family have a latency of ~24 cycles, and take 6 cycles to complete and 64 bit int is substantially slower, while FDIV is 14-16 cycle latency, 4-5 cycles to complete),. You can find my full solution here. 23, 2023 — Training Time:. If you are unfamiliar with Project Euler, it's a website where users can solve tricky problems that require both mathematics and programming to solve. Will Orrick Will Orrick. 2. 40GHz. After each iteration, next=a+b and then a becomes b and b becomes next. py","path":"python/eulerlib. task. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 -DORIGINAL ) See here for a comparison of all solutions. Three by three; 2. list (itertools. It is possible to make £2 in the following way: 1×£1 + 1×50p + 2×20p + 1×5p + 1×2p + 3×1p. Here's the code: import numpy as np s = '''08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08 49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00 81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 03 49 13 36 65 52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 02 36. I can try them to implement my current code. Code Issues Pull requests Problems of Project Euler for anyone interested in improving their programming skills in the form of challenging mathematical problems. Not all numbers produce palindromes so quickly. What is the sum of the numbers on the diagonals in a 1001 by 1001 spiral formed in the same way?This solution contains 13 empty lines, 14 comments and 1 preprocessor command. list (itertools. By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum total from top to bottom is 23. gitignore","contentType":"file"},{"name":"A1paper_4. 91%. current cell and its three neighbors going left and down. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 . Ultimately, from what I've seen of the Project Euler forums, it's a really, really bad venue for discussing code. The correct solution to the original Project Euler problem was found in 0. 1 (6) means 0. It hosts a collection of around 600 different algorithm problems that get progressively harder, to the point where even people with math PhD's still struggle with them. 40GHz. 40GHz. 7. (compiled for x86_64 / Linux, GCC flags: -O3 -march=native -fno-exceptions -fno-rtti -std=gnu++11 .