华为机试题：删除字符串中出现次数最少的字符

电玩女神 2022-08-20 05:19 157阅读 0赞

<table style="margin:0px; padding:0px; width:970px; border:0px; border-collapse:collapse; border-spacing:0px; empty-cells:show; color:rgb(0,0,0); font-family:'Times New Roman',Arial,微软雅黑,宋体,Tahoma,Helvetica,SimSun,sans-serif,宋体"> 
 <tbody style="margin:0px; padding:0px"> 
  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 描述:&nbsp;</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> <p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px"> 实现删除字符串中出现次数最少的字符，若多个字符出现次数一样，则都删除。输出删除这些单词后的字符串，字符串中其它字符保持原来的顺序。</p> &nbsp;</td> 
  </tr> 
  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 题目类别:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> &nbsp;字符串&nbsp;</td> 
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  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 难度:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> &nbsp;中级&nbsp;</td> 
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  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 运行时间限制:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 10Sec</td> 
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  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 内存限制:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 128MByte</td> 
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  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 阶段:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> &nbsp;入职前练习&nbsp;</td> 
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  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 输入:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> &nbsp; <p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px"> 字符串只包含小写英文字母,&nbsp;不考虑非法输入，输入的字符串长度小于等于20个字节。</p> &nbsp;</td> 
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  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 输出:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> &nbsp; <p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px"> 删除字符串中出现次数最少的字符后的字符串。</p> &nbsp;</td> 
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  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 样例输入:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> <pre style="margin-top:0px; margin-bottom:0px; padding:0px; white-space:pre-wrap; word-wrap:break-word; line-height:24px">abcdd

</pre> </td> 
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  <tr style="margin:0px; padding:0px; height:26px"> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; border-right-style:solid; border-right-width:1px; border-right-color:rgb(238,238,238); font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> 样例输出:</td> 
   <td style="margin:0px; padding:6px 3px 3px; word-break:break-all; word-wrap:break-word; font-size:14px; border-bottom-style:solid; border-bottom-width:1px; border-bottom-color:rgb(238,238,238)"> <pre style="margin-top:0px; margin-bottom:0px; padding:0px; white-space:pre-wrap; word-wrap:break-word; line-height:24px">dd</pre> </td> 
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#include <iostream>
    #include <stdio.h>
    #include <string>
    #include <algorithm>
    #include <map>
    #include <vector>
    
    using namespace std;
    
    int main()
    {
        string str,ret;
        map<char,int> mmap;
        vector<char> vec;
        int lens = 0, i =0;
        int minwords = 100000;
    
        cin >> str;
        lens = str.size();
    
        /*统计每一个单词的个数*/
        for(i = 0; i < lens; i ++)
        {
            mmap[str[i]]++;
        }
    
        /*找出最少的单词个数*/
        map<char,int>::iterator it;
        for(it = mmap.begin(); it != mmap.end(); it++)
        {
            if(it->second < minwords)
            {
                minwords = it->second ;
            }
        }
    
        /*把一样少的数据，放入到vec中*/
        for(it = mmap.begin(); it != mmap.end(); it++)
        {
            if(it->second == minwords)
            {
                vec.push_back(it->first);
            }
        }
    
        /*求出结果字符串*/
        lens = str.size();
        vector<char>::iterator it_vec;
        for(i = 0; i < lens; i++)
        {
            it_vec = find(vec.begin(),vec.end(),str[i]);
    
            /*没有找到*/
            if(it_vec == vec.end())
            {
                ret = ret + str[i];
            }
        }
    
        cout << ret << endl;
        return 0;
    }