zoukankan      html  css  js  c++  java
  • Poj 1552 Doubles(水题)

    一、Description
    As part of an arithmetic competency program, your students will be given randomly generated lists of from 2 to 15 unique positive integers and asked to determine how many items in each list are twice some other item in the same list. You will need a program to help you with the grading. This program should be able to scan the lists and output the correct answer for each one. For example, given the list
    1 4 3 2 9 7 18 22
    your program should answer 3, as 2 is twice 1, 4 is twice 2, and 18 is twice 9.

    Input

    The input will consist of one or more lists of numbers. There will be one list of numbers per line. Each list will contain from 2 to 15 unique positive integers. No integer will be larger than 99. Each line will be terminated with the integer 0, which is not considered part of the list. A line with the single number -1 will mark the end of the file. The example input below shows 3 separate lists. Some lists may not contain any doubles.

    Output

    The output will consist of one line per input list, containing a count of the items that are double some other item.
    二、题解
            水题啊,今天把水题都做完了,以后我要怎么办啊!!
    三、Java代码
    import java.util.Scanner;
    
    public class Main {
    	
        public static void main(String[] args) { 
        	Scanner sc=new Scanner(System.in);
        	int i,j,k,sum;
        	int a[]=new int[16];
        	while((a[0]=sc.nextInt())!=-1){
        		i=1;
        		sum=0;
        		while((a[i]=sc.nextInt())!=0){
        			i++;
        		}
        		for(k=0;k<i;k++){
        			for(j=0;j<i;j++){
        				if(a[k]*2==a[j])
        					sum++;
        			}
        		}
        		System.out.println(sum);
        	}
        }
    } 


    版权声明:本文为博主原创文章,未经博主允许不得转载。

  • 相关阅读:
    Python Tkinter canvas oval原理
    ButterKnife你需要知道的点
    RecyclerView不同类型Item的展示
    PNG图片小结
    安装应用
    java.io.IOException: open failed: ENOENT (No such file or directory)open failed: EISDIR (Is a directory)
    YouTube视频插入Markdown
    Android icons集合
    vue动态绑定类样式ClassName知多少
    js正则表达式中的正向肯定预查和正向否定预查
  • 原文地址:https://www.cnblogs.com/AndyDai/p/4734163.html
Copyright © 2011-2022 走看看