hdu 2816 I Love You Too

#include <iostream>
#include <string>

using namespace std;

char dig[1100];
char map[10][10]={{'A','B','C'},{'D','E','F'},
{'G','H','I'},{'J','K','L'},
{'M','N','O'},{'P','Q','R','S'},
{'T','U','V'},{'W','X','Y','Z'}};
char str[510];
char str1[510];
char str3[510];
char str2[30][2]={{'Q','A'},{'W','B'},{'E','C'},{'R','D'},
{'T','E'},{'Y','F'},{'U','G'},{'I','H'},
{'O','I'},{'P','J'},{'A','K'},{'S','L'},
{'D','M'},{'F','N'},{'G','O'},{'H','P'},
{'J','Q'},{'K','R'},{'L','S'},{'Z','T'},
{'X','U'},{'C','V'},{'V','W'},{'B','X'},
{'N','Y'},{'M','Z'}};
int main()
{
while(gets(dig))
{
int aa=0,j=0;
for(int i=0;i<strlen(dig);i+=2)
{
j = i;
str[aa++]=map[dig[j]-'0'-2][dig[j+1]-'0'-1];
}

int bb=0;
for(int i=0;i<aa;i++)
{
for(int k=0;k<26;k++)
if(str[i]==str2[k][0])
str1[bb++]=str2[k][1];
}
if(bb%2==0)
{
for(int i=bb/2-1,k=bb-1;i>=0&&k>=bb/2;k--,i--)
cout<<str1[k]<<str1[i];
}
int cc=0;
if(bb%2!=0)
{
for(int i=bb/2;i>=0;i--)
{
str3[cc]=str1[i];
cc+=2;
}
cc=1;
for(int i=bb-1;i>bb/2;i--)
{
str3[cc]=str1[i];
cc+=2;
}
for(int i=0;i<bb;i++)
cout<<str3[i];
}
cout<<endl;
memset(str,0,sizeof(str));
memset(str1,0,sizeof(str1));
memset(str3,0,sizeof(str3));
memset(dig,0,sizeof(dig));
}
return 0;
}