一种排序

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mob604756fda125 2015-08-11 15:41:00

文章标签 i++ #include 数据 ios 数组 文章分类 数据结构与算法人工智能

一种排序

时间限制：3000 ms | 内存限制：65535 KB

难度：3

描写叙述如今有非常多长方形，每个长方形都有一个编号，这个编号能够反复；还知道这个长方形的宽和长，编号、长、宽都是整数；如今要求依照一下方式排序（默认排序规则都是从小到大）；

1.依照编号从小到大排序

2.对于编号相等的长方形，依照长方形的长排序；

3.假设编号和长都同样。依照长方形的宽排序；

4.假设编号、长、宽都同样，就仅仅保留一个长方形用于排序,删除多余的长方形；最后排好序依照指定格式显示全部的长方形。

输入第一行有一个整数 0<n<10000,表示接下来有n组測试数据；

每一组第一行有一个整数 0<m<1000。表示有m个长方形；

接下来的m行。每一行有三个数，第一个数表示长方形的编号，

第二个和第三个数值大的表示长。数值小的表示宽。相等

说明这是一个正方形（数据约定长宽与编号都小于10000）；输出顺序输出每组数据的全部符合条件的长方形的编号长宽例子输入

例子输出

思路：这题是先排序。再删减。。昨天我是先删减，再排序，结果wa了。。在讨论组里看到有个大神写的是先sort，再删减。

。

我心里想不一样吗。。

额，肯定是不一样的。

比方把长方形的3个属性用小写字母表示。比方開始输入是abca.先排序aabc,然后删减abc，得到正解。可是假设先删减，b数组里面存放仍然是abca,再排序aabc。就会有反复的。

。须要注意。

#include<iostream>
#include<algorithm>
using namespace std;
struct cfx
{
  int length;
  int width;
  int num;
};
int cmp(cfx a,cfx b)
{
  if(a.num!=b.num)
    return a.num<b.num;//升序
   else if(a.num==b.num &&a.length!=b.length)
    return a.length<b.length;
  else if(a.num==b.num &&a.length==b.length)
    return a.width<b.width;
}
int main()
{
  int n,m,i,k;
  cfx a[1000];
  cfx b[1000];
  cin>>n;
  while(n--)
  {
    k=0;
      cin>>m;//m个长方形
    for(i=0;i<m;i++)
    {
      cin>>a[i].num>>a[i].length>>a[i].width;
      if(a[i].length<a[i].width)
      {
        int t;
        t=a[i].length;
        a[i].length=a[i].width;
        a[i].width=t;   
      }
    }
     sort(a,a+m,cmp);
      for(i=0;i<m;i++) //aabbcc
      {
             while(i<m-1 &&a[i].length==a[i+1].length &&a[i].num==a[i+1].num &&a[i].width==a[i+1].width)
       {
         i++;
       }
       b[k++]=a[i];  
      }

      for(i=0;i<k;i++)
      {
        cout<<b[i].num<<" "<<b[i].length<<" "<<b[i].width<<endl;
      }

  }
  return 0;
}

<dd style="color: rgb(70, 70, 70); font-family: Tahoma, Arial, sans-serif, simsun; font-size: 14px; margin: 0px; padding: 0px;"><pre name="code" class="cpp">//今天又看了一下,能够不用申请b数组。。

<span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; background-color: rgb(253, 253, 253);">#include<iostream></span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">#include<algorithm></span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">using namespace std;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">struct cfx</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">{</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">int chang;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">int kuan;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">int num;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">};</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">int cmp(cfx a,cfx b)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">{</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">if(a.num!=b.num)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">return a.num<b.num;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">else if(a.num==b.num &&a.chang!=b.chang)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">return a.chang<b.chang;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">else if(a.num==b.num &&a.chang==b.chang &&a.kuan!=b.kuan)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">return a.kuan<b.kuan;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">}</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">int main()</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">{</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">int T,m,i;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">cfx a[1000];</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">cin>>T;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">while(T--)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">{</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">cin>>m;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">for(i=0;i<m;i++)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">{</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">cin>>a[i].num>>a[i].chang>>a[i].kuan;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">if(a[i].chang<a[i].kuan)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">{</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">int t;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">t=a[i].chang;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">a[i].chang=a[i].kuan;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">a[i].kuan=t;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">}</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">}</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">sort(a,a+m,cmp);//排序</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">for(i=0;i<m;i++)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">{</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">while(i<m-1 && a[i].chang==a[i+1].chang &&a[i].num==a[i+1].num && a[i].kuan==a[i+1].kuan)</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">{</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">i++;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">}</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">cout<<a[i].num<<" "<<a[i].chang<<" "<<a[i].kuan<<endl;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">}</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">}</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">return 0;</span><br style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);" /><span style="font-family: Tahoma, Arial, sans-serif, simsun; font-size: 12.800000190734863px; line-height: 19.5px; text-indent: 20px; background-color: rgb(253, 253, 253);">}</span>

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