HDOJ(HDU).1058 Humble Numbers (DP) 点我挑战题目 题意分析 水 代码总览 /* Title:HDOJ.1058 Author:pengwill Date:2017-2-15 */ #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #define nmax 6000 #define min(a,b) (a<b?a:b…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1058 解题报告:输入一个n,输出第n个质因子只有2,3,5,7的数. 用了离线打表,因为n最大只有5842. #include<stdio.h> #define INT __int64 INT ans[] = { ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,…

Humble Numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 18238    Accepted Submission(s): 7934 Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble numbe…

Humble Numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 14584    Accepted Submission(s): 6313 Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble numbe…

Humble Numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 16742    Accepted Submission(s): 7280 Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble numb…

这题应该是用dp来做的吧,但一时不想思考了,写了个很暴力的,类似模拟打表,然后排序即可,要注意的是输出的格式,在这里wa了一发,看了别人的代码才知道哪些情况没考虑到. #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> #define For(i,s,t) for(int i=s; i<=t; ++i) using namespace std; typedef l…

题意:给出丑数的定义,只含有2,3,5,7这四个素数因子的数称为素数.求第n个丑数. 可以先观察几个丑数得出规律 1:dp[1] 2:min(1*2,1*3,1*5,1*7) 3:min(2*2,1*3,1*5,1*7) 4:min(2*2,2*3,1*5,1*7) 5:min(3*2,2*3,1*5,1*7) 6:min(3*2,2*3,2*5,1*7) 7:min(4*2,3*3,2*5,1*7) 8:min(4*2,3*3,2*5,2*7) 9:min(5*2,3*3,2*5,2*7) 然…

题意: 一个数的质因子如果只是2,3,5,7中的若干个.则这个数叫做humble number. 例如:1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... 给n,问第n个humble number是多少. 思路: 所有的humble数的构造都是:(2^a)*(3^b)*(5^c)*(7^d).a,b,c,d大于等于0. X=a+b+c+d代表这个数是第X个humble数. 假设前i-1个humble…

Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, - shows the first 20 humble numbers. Write a program to find and print…

Humble Number Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20 humble numbers. Write a program t…

Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20 humble numbers. Write a program to find and pri…

简单题,注意打表,以及输出格式.这里使用了可变参数. #include <stdio.h> #define MAXNUM 5845 #define ANS 2000000000 int buf[MAXNUM]; int min(int a, int b) { return a<b ? a:b; } int minn(int argc, ...) { int i, tmp; ; tmp = *arg; ; i<argc; ++i) tmp = min(tmp, *++arg); re…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=1058 Humble Numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 29253    Accepted Submission(s): 12809 Problem Description A number whose only…

Humble Numbers Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1058 Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9…

A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20 humble numbers. Write a program to find and print the nth element i…

Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20 humble numbers. Now given a humble number, please write…

题目描述:给定一个区间,将这个区间里所有既是素数又是回文数的数输出来. 题目分析:这题的这个数据范围比较大,达到了10^8级别,而且输入的数据有多组,又因为判断一个数是否是回文数貌似只有暴力判断,时间限制是1000ms,所以如果对于每组数据输入都暴力判断的话,应该就TLE了,那么我们该怎么办呢.我们想到回文数本来就不多,再加上还必须要是素数,猜想数据范围虽然非常大,但是在这个区间里面满足条件的数应该不多,我算了一下,只有700多个,所以我们很自然地想到用离线打表,将这个区间内所有的满足条件的数存…

Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20 humble numbers. Write a program to find and pri…

Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1058 Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 1…

Humble Numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 14047    Accepted Submission(s): 6108 Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble numb…

http://acm.hdu.edu.cn/showproblem.php?pid=1058 Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20…

P2723 丑数 Humble Numbers 52通过 138提交 题目提供者该用户不存在 标签USACO 难度普及/提高- 提交  讨论  题解 最新讨论 暂时没有讨论 题目背景 对于一给定的素数集合 S = {p1, p2, ..., pK},考虑一个正整数集合,该集合中任一元素的质因数全部属于S.这个正整数集合包括,p1.p1*p2.p1*p1.p1*p2*p3...(还有其它).该集合被称为S集合的"丑数集合".注意:我们认为1不是一个丑数. 题目描述 你的工作是对于输入的集…

HDU 3117 Fibonacci Numbers(斐波那契前后四位,打表+取对+矩阵高速幂) ACM 题目地址:HDU 3117 Fibonacci Numbers 题意:  求第n个斐波那契数的前四位和后四位.  不足8位直接输出. 分析:  前四位有另外一题HDU 1568,用取对的方法来做的.  后四位能够用矩阵高速幂,MOD设成10000即可了. 代码: /* * Author: illuz <iilluzen[at]gmail.com> * Blog: http://blog.c…

A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20 humble numbers. Write a program to find and print the nth element i…

The number of divisors(约数) about Humble Numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2039    Accepted Submission(s): 1002 Problem Description A number whose only prime factors are 2,…

     DP -- Humble numbers  //一开始理解错题意了,题意是是说一些只有唯一一个质因数(质因数只包括2,3,5,7)组成的数组,请找出第n个数是多少 //无疑,先打表,否则果断超时 #include <iostream> using namespace std; ]; ] = {, , , }; ]; int main() { int i,j; ; i < ; i++) a[i] = ; ans[] = ; ; i < ; i++) { ; ; j <…

King's Game 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5643 Description In order to remember history, King plans to play losephus problem in the parade gap.He calls n(1≤n≤5000) soldiers, counterclockwise in a circle, in label 1,2,3...n. The firs…

DP 水题 Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the first 20 humble numbers. Write a program to find and print…

The number of divisors(约数) about Humble Numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2044    Accepted Submission(s): 1006 Problem DescriptionA number whose only prime factors are 2,3,…

Humble Numbers Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 9988 Accepted: 4665 Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20,…