原题链接 简要题意: 构造一个长为 \(n\) 的数,使得每位均不为 \(0\),且 \(n\) 不被它的各位数字整除. 比方说, \(n = 239\) 是合法的.因为: \(2 \not | 239\),\(3 \not | 239\),\(9 \not | 239\). 再比方,\(n = 235\) 是不合法的.因为: \(5 | 235\). 因此,本题是个水构造. 首先 \(n = 1\),显然无解. 否则,考虑以下构造: \[233 \cdots 33 \] \[499 \cdot…

[POJ1338]Ugly Numbers 试题描述 Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, ... shows the first 10 ugly numbers. By convention, 1 is included. Given the integer n,write a program to find an…

一.题目大意 本题要求写出前1500个仅能被2,3,5整除的数. 二.题解 最初的想法是从1开始检验该数是否只能被2,3,5整除,方法是这样的,对于一个数,如果它能被2整除,就除以2,如果它能被3整除,就除以3,如果它能被5整除,就除以5,直到不能被2,3,5整除,看结果是不是1,如果是1就满足条件,否则不满足条件.但是第1500个数大约近10亿,显然是1s内不可以完成的. 然后仔细分析发现:满足条件的数是2^x*3^y*5^z,可以转换为这样的定义,定义一个集合,该集合中有元素1,如果x在集合…

Ugly Numbers Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 21918 Accepted: 9788 Description Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, - shows the first 10 ugly numbers.…

转载请注明出处:viewmode=contents">http://blog.csdn.net/u012860063? viewmode=contents 题目链接:id=1338">http://poj.org/problem?id=1338 Description Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence  1, 2, 3, 4, 5, 6, 8, 9, 1…

https://leetcode.com/problems/ugly-number/ Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it include…

Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, …shows the first 11 ugly numbers. By convention, 1 is included.Write a program to find and print the 150′th ugly number. METHOD 1 (Simple…

 Ugly Numbers  Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, ... shows the first 11 ugly numbers. By convention, 1 is included. Write a program to find and print the 1500'th ugly num…

题目链接:http://poj.org/problem?id=1338 Ugly Numbers Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 21920   Accepted: 9789 Description Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence 1, 2, 3, 4, 5, 6, 8, 9, 10,…

丑数(Ugly Numbers, UVa 136) 题目描述 我们把只包含因子2.3和5的数称作丑数(Ugly Number).求按从小到大的顺序的第1500个丑数.例如6.8都是丑数,但14不是,因为它包含因子7.习惯上我们把1当做第一个丑数. 算法实现 版本1:错误版本 //#define LOCAL #include<iostream> #include<cstdio> #include<queue> /* 输出第1500个丑数 */ using namespac…