UVa 10252 Common Permutation

UVa 10252 Common Permutation

以下是我的代码：

#include < iostream >
#include < fstream >
#include < string >
#include < bitset >
#include < stdio.h >
#include < stdlib.h >
#include < string .h >
#include < ctype.h >
using   namespace  std;
long  min( long  a, long  b){ return  (a < b ? a:b);}

int  main()
{
     string  a,b;
     long  cnta[ 27 ],cntb[ 27 ];
    
     while (getline(cin,a) && getline(cin,b))
    {
       memset(cnta, 0 , sizeof (cnta));
       memset(cntb, 0 , sizeof (cntb));
       
        for ( long  i = 0 ;i < ( long )a.length();i ++ )
         cnta[a[i] - ' a ' ] ++ ;
        for ( long  i = 0 ;i < ( long )b.length();i ++ )
         cntb[b[i] - ' a ' ] ++ ;
       
        for ( long  i = 0 ;i < 26 ;i ++ )
          for ( long  j = 1 ;j <= min(cnta[i],cntb[i]);j ++ )
           cout << ( char )(i + ' a ' );
       cout << endl;
    }
return   0 ;
}