HDU 1113 Word Amalgamation

Word Amalgamation

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 4429    Accepted Submission(s): 2229

Problem Description

In millions of newspapers across the United States there is a word game called Jumble. The object of this game is to solve a riddle, but in order to find the letters that appear in the answer it is necessary to unscramble four words. Your task is to write a program that can unscramble words.

 

Input

The input contains four parts:

1. a dictionary, which consists of at least one and at most 100 words, one per line;
2. a line containing XXXXXX, which signals the end of the dictionary;
3. one or more scrambled `words' that you must unscramble, each on a line by itself; and
4. another line containing XXXXXX, which signals the end of the file.

All words, including both dictionary words and scrambled words, consist only of lowercase English letters and will be at least one and at most six characters long. (Note that the sentinel XXXXXX contains uppercase X's.) The dictionary is not necessarily in sorted order, but each word in the dictionary is unique.

 

Output

For each scrambled word in the input, output an alphabetical list of all dictionary words that can be formed by rearranging the letters in the scrambled word. Each word in this list must appear on a line by itself. If the list is empty (because no dictionary words can be formed), output the line ``NOT A VALID WORD" instead. In either case, output a line containing six asterisks to signal the end of the list.

 

Sample Input

tarp given score refund only trap work earn course pepper part XXXXXX resco nfudre aptr sett oresuc XXXXXX

 

Sample Output

score ****** refund ****** part tarp trap ****** NOT A VALID WORD ****** course ******

 

Source

Mid-Central USA 1998

 

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 分析：既然要找字典中出现过的单词，那么我们可以把字典中出现的单词用map来进行记录。

下面的单词，比如对于单词a，我们先将它按字典序排序，再用next_permutation找出长度为len,并且字典序从小到大的单词变形，查找它是否在字典中出现过

(注意next_permutation并不会输出最开始的形态）

代码如下：

#include <iostream>
#include <string>
#include <queue>
#include <vector>
#include <cstring>
#include <map>
#include <algorithm>
using namespace std;
char a[10];
map<string,int>mp;
int len;
int main()
{
    int f,f2;
 //   freopen("1.out","w",stdout);
    f2=0;
   while(scanf("%s",a))
   {
      if(!strcmp(a,"XXXXXX"))
      {
         while(scanf("%s",a))
         {
              if(!strcmp(a,"XXXXXX")){
                    f2=1;
                break;
              }
             f=0;
           len=strlen(a);
           sort(a,a+len);
           if(mp[a]==1)
           {
               f=1;
            printf("%s
",a);
           }
           while(next_permutation(a,a+len))
           {
               if(strlen(a)==len&&mp[a]==1){
                f=1;
               printf("%s
",a);
               }
           }
           if(f==0)puts("NOT A VALID WORD");
           puts("******");
         }
      }
      else
      {
          mp[a]=1;
      }
      if(f2==1)break;
   }
    return 0;
}