UVA 644 Immediate Decodability （字符处理）

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An encoding of a set of symbols is said to be immediately decodable if no code for one symbol is the prefix of a code for another symbol. We will assume for this problem that all codes are in binary, that no two codes within a set of codes are the same, that each code has at least one bit and no more than ten bits, and that each set has at least two codes and no more than eight.

Examples: Assume an alphabet that has symbols {A, B, C, D}

The following code is immediately decodable:

A:01 B:10 C:0010 D:0000

but this one is not:

A:01 B:10 C:010 D:0000 (Note that A is a prefix of C)

Input 

Output 

The Sample Input describes the examples above.

Sample Input 

01
10
0010
0000
9
01
10
010
0000
9

Sample Output 

Set 1 is immediately decodable
Set 2 is not immediately decodable

一个串不能是另一个串的前缀。

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<map>
typedef long long LL;
using namespace std;
#define REPF( i , a , b ) for ( int i = a ; i <= b ; ++ i )
#define REP( i , n ) for ( int i = 0 ; i < n ; ++ i )
#define CLEAR( a , x ) memset ( a , x , sizeof a )
//map<string,int>q;
char str[1100][10],s[10];
int main()
{
    int cas=1;
     std::ios::sync_with_stdio(false);
     while(cin>>str[0])
     {
         int l=1;
         char *p;
         while(cin>>str[l]&&str[l++][0]!='9');
         int flag=1;
         REP(i,l-1)
         {
             REP(j,l-1)
             {
                 if(i==j)  continue;
                 p=strstr(str[i],str[j]);
                 if((p-str[i])==0)
                 {
                     flag=0;
                     break;
                 }
             }
         }
         if(flag)  printf("Set %d is immediately decodable\n",cas++);
         else     printf("Set %d is not immediately decodable\n",cas++);
     }
     return 0;
}

UVA 644 Immediate Decodability （字符处理）

标签：des   style   io   color   ar   os   sp   for   strong   

原文地址：http://blog.csdn.net/u013582254/article/details/40915481