zoukankan      html  css  js  c++  java
  • HDU 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 humble numbers. 

    Write a program to find and print the nth element in this sequence
     
    Input
    The input consists of one or more test cases. Each test case consists of one integer n with 1 <= n <= 5842. Input is terminated by a value of zero (0) for n.
     
    Output
    For each test case, print one line saying "The nth humble number is number.". Depending on the value of n, the correct suffix "st", "nd", "rd", or "th" for the ordinal number nth has to be used like it is shown in the sample output.
     
    Sample Input
    1 2 3 4 11 12 13 21 22 23 100 1000 5842 0
     
    Sample Output
    The 1st humble number is 1. The 2nd humble number is 2. The 3rd humble number is 3. The 4th humble number is 4. The 11th humble number is 12. The 12th humble number is 14. The 13th humble number is 15. The 21st humble number is 28. The 22nd humble number is 30. The 23rd humble number is 32. The 100th humble number is 450. The 1000th humble number is 385875. The 5842nd humble number is 2000000000.

    每个数字,乘以2、3、5、7都会产生一个新的num

     1 #include<cstdio>
     2 int min(const int a,const int b,const int c,const int d)
     3 {
     4     int m=a;
     5     if(m>b) m=b;
     6     if(m>c) m=c;
     7     if(m>d) m=d;
     8     return m;
     9 } 
    10 int num[5845]={0,1};
    11 int main()
    12 {
    13     int c2=1,c3=1,c5=1,c7=1;
    14     for(int i=2;i<=5842;i++){
    15         
    16         num[i]=min(2*num[c2],3*num[c3],5*num[c5],7*num[c7]);
    17         
    18         if(num[i]==2*num[c2]) c2++;
    19         if(num[i]==3*num[c3]) c3++;
    20         if(num[i]==5*num[c5]) c5++;
    21         if(num[i]==7*num[c7]) c7++;
    22         
    23     }
    24     
    25     int n;char* str[]={"th","st","nd","rd","th","th","th","th","th","th"};
    26     while(scanf("%d",&n) && n>0){
    27         int xh=n%10;
    28         if(n%100==11 || n%100==12 || n%100==13) xh=0; 
    29         printf("The %d%s humble number is %d.
    ",n,str[xh],num[n]);
    30     }
    31 }


     

  • 相关阅读:
    IBM Personal Communications 软件:精简绿色版TN3270终端模拟器:经测试可以在 (winxp、win2003、win764)上运行
    virtualbox谨记:续....
    Eclipse连接MySQL数据库
    shell几种字符串加密解密的方法
    表达式语言引擎:Apache Commons JEXL 2.1 发布
    一种表达式语言的解析引擎JEXL简单使用
    Java 实现String语句的执行(Jexl)
    JUnit4
    EL表达式
    Looping through the content of a file in Bash
  • 原文地址:https://www.cnblogs.com/dilthey/p/6804176.html
Copyright © 2011-2022 走看看