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2017年3月28日

Project Euler Problem 23 Non-abundant sums

摘要： Non-abundant sumsProblem 23A perfect number is a number for which the sum of its proper divisors is exactly equal to the number. For e... 阅读全文

posted @ 2017-03-28 09:58 海岛Blog 阅读(133) 评论(0) 推荐(0) 编辑

Project Euler Problem 24 Lexicographic permutations

摘要： Lexicographic permutationsProblem 24A permutation is an ordered arrangement of objects. For example, 3124 is one possible permutation ... 阅读全文

posted @ 2017-03-28 08:22 海岛Blog 阅读(203) 评论(0) 推荐(0) 编辑

2017年3月27日

Project Euler Problem 19 Counting Sundays

摘要： Counting SundaysProblem 19You are given the following information, but you may prefer to do some research for yourself.1 Jan 1900 was ... 阅读全文

posted @ 2017-03-27 04:01 海岛Blog 阅读(159) 评论(0) 推荐(0) 编辑

2017年3月26日

CCF201703-2 学生排队（100分）

摘要： 试题编号：201703-2试题名称：学生排队时间限制：1.0s内存限制：256.0MB问题描述：问题描述 体育老师小明要将自己班上的学生按顺序排队。他首先让学生按学号从小到大的顺序排成一排，学号小的排在前面，然后进行多次调整。一次调整小明可能让一位同学出队，向前或者... 阅读全文

posted @ 2017-03-26 18:40 海岛Blog 阅读(510) 评论(0) 推荐(0) 编辑

Project Euler Problem 17 Number letter counts

摘要： Number letter countsProblem 17If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + ... 阅读全文

posted @ 2017-03-26 15:57 海岛Blog 阅读(307) 评论(0) 推荐(0) 编辑

2017年3月25日

CCF201703-1 分蛋糕（100分）

摘要： 试题编号：201703-1试题名称：分蛋糕时间限制：1.0s内存限制：256.0MB问题描述：问题描述 小明今天生日，他有n块蛋糕要分给朋友们吃，这n块蛋糕（编号为1到n）的重量分别为a1, a2, …, an。小明想分给每个朋友至少重量为k的蛋糕。小明的朋友们已经... 阅读全文

posted @ 2017-03-25 15:48 海岛Blog 阅读(350) 评论(0) 推荐(0) 编辑

Project Euler Problem 92 Square digit chains

摘要： Square digit chainsProblem 92A number chain is created by continuously adding the square of the digits in a number to form a new numbe... 阅读全文

posted @ 2017-03-25 08:37 海岛Blog 阅读(124) 评论(0) 推荐(0) 编辑

2017年3月24日

Project Euler Problem 543 Prime-Sum Numbers

摘要： Prime-Sum NumbersProblem 543Define function P(n,k) = 1 ifn can be written as the sum of k prime numbers (with repetitions allowed), an... 阅读全文

posted @ 2017-03-24 08:04 海岛Blog 阅读(141) 评论(0) 推荐(0) 编辑

2017年3月23日

Project Euler Problem 99 Largest exponential

摘要： Largest exponentialProblem 99Comparing two numbers written in index form like 211 and 37 is not difficult, as any calculator would con... 阅读全文

posted @ 2017-03-23 21:12 海岛Blog 阅读(104) 评论(0) 推荐(0) 编辑

HDU4506 小明系列故事——师兄帮帮忙

摘要： 问题链接：HDU4506 小明系列故事——师兄帮帮忙。问题描述：参见上述链接。问题分析：（略）。程序说明：函数powermod()是快速模幂函数。AC的C++语言程序如下：/* HDU4506 小明系列故事——师兄帮帮忙 */#include using namesp... 阅读全文

posted @ 2017-03-23 16:17 海岛Blog 阅读(124) 评论(0) 推荐(0) 编辑

Project Euler Problem 21 Amicable numbers

摘要： Amicable numbersProblem 21Let d(n) be defined as the sum of proper divisors ofn (numbers less thann which divide evenly into n).If d(a... 阅读全文

posted @ 2017-03-23 09:11 海岛Blog 阅读(141) 评论(0) 推荐(0) 编辑

Project Euler Problem 25 1000-digit Fibonacci number

摘要： 1000-digit Fibonacci numberProblem 25The Fibonacci sequence is defined by the recurrence relation:Fn = Fn−1 + Fn−2, where F1 = 1 and F... 阅读全文

posted @ 2017-03-23 06:35 海岛Blog 阅读(189) 评论(0) 推荐(0) 编辑

Project Euler Problem 20 Factorial digit sum

摘要： Factorial digit sumProblem 20n! means n × (n − 1) × ... × 3 × 2 × 1For example, 10! = 10 × 9 × ... × 3 × 2 × 1 = 3628800,and the sum o... 阅读全文

posted @ 2017-03-23 00:11 海岛Blog 阅读(146) 评论(0) 推荐(0) 编辑

2017年3月22日

Project Euler Problem 67 Maximum path sum II

摘要： Maximum path sum IIProblem 67By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum... 阅读全文

posted @ 2017-03-22 23:06 海岛Blog 阅读(123) 评论(0) 推荐(0) 编辑

Project Euler Problem 18 Maximum path sum I

摘要： Maximum path sum IProblem 18By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum ... 阅读全文

posted @ 2017-03-22 22:55 海岛Blog 阅读(128) 评论(0) 推荐(0) 编辑

Project Euler Problem 16 Power digit sum

摘要： Power digit sumProblem 16215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.What is the sum of the digits of the number 2... 阅读全文

posted @ 2017-03-22 19:28 海岛Blog 阅读(111) 评论(0) 推荐(0) 编辑

Project Euler Problem 16 Power digit sum

摘要： Power digit sumProblem 16215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.What is the sum of the digits of the number 2... 阅读全文

posted @ 2017-03-22 19:28 海岛Blog 阅读(135) 评论(0) 推荐(0) 编辑

Project Euler Problem 47 Distinct primes factors

摘要： Distinct primes factorsProblem 47The first two consecutive numbers to have two distinct prime factors are:14 = 2 × 715 = 3 × 5The firs... 阅读全文

posted @ 2017-03-22 18:20 海岛Blog 阅读(231) 评论(0) 推荐(0) 编辑

Project Euler Problem 47 Distinct primes factors

摘要： Distinct primes factorsProblem 47The first two consecutive numbers to have two distinct prime factors are:14 = 2 × 715 = 3 × 5The firs... 阅读全文

posted @ 2017-03-22 18:20 海岛Blog 阅读(182) 评论(0) 推荐(0) 编辑

Project Euler Problem 15 Lattice paths

摘要： Lattice pathsProblem 15Starting in the top left corner of a 2×2 grid, and only being able to move to the right and down, there are exa... 阅读全文

posted @ 2017-03-22 05:54 海岛Blog 阅读(102) 评论(0) 推荐(0) 编辑

Project Euler Problem 15 Lattice paths

摘要： Lattice pathsProblem 15Starting in the top left corner of a 2×2 grid, and only being able to move to the right and down, there are exa... 阅读全文

posted @ 2017-03-22 05:54 海岛Blog 阅读(107) 评论(0) 推荐(0) 编辑

2017年3月21日

Project Euler Problem 14 Longest Collatz sequence

摘要： Longest Collatz sequenceProblem 14The following iterative sequence is defined for the set of positive integers:n → n/2 (n is even)n → ... 阅读全文

posted @ 2017-03-21 10:06 海岛Blog 阅读(154) 评论(0) 推荐(0) 编辑

Project Euler Problem 14 Longest Collatz sequence

摘要： Longest Collatz sequenceProblem 14The following iterative sequence is defined for the set of positive integers:n → n/2 (n is even)n → ... 阅读全文

posted @ 2017-03-21 10:06 海岛Blog 阅读(174) 评论(0) 推荐(0) 编辑

2017年3月20日

Project Euler Problem 13 Large sum

摘要： Large sumProblem 13Work out the first ten digits of the sum of the following one-hundred 50-digit numbers.3710728753390210279879799822... 阅读全文

posted @ 2017-03-20 23:50 海岛Blog 阅读(114) 评论(0) 推荐(0) 编辑

Project Euler Problem 13 Large sum

摘要： Large sumProblem 13Work out the first ten digits of the sum of the following one-hundred 50-digit numbers.3710728753390210279879799822... 阅读全文

posted @ 2017-03-20 23:50 海岛Blog 阅读(177) 评论(0) 推荐(0) 编辑

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