Q555: Bridge Hands

/*
 用gets(str)才會對
 用scanf("%c%c", &a, &b);會Time limit exceeded
 Run time: 0.060
*/
#include <stdio.h>
#define N 0
#define E 1
#define S 2
#define W 3

typedef struct {
  int dir;
 char suit;
 char rank;
} Card;
Card card[52];
int arr[4][13];

void assign(Card p);
int index(char ch);
void print(int turn);
char reverse(int index);

int main()
{
 char ch;
 int i, j;
 int aspect;

 while (1)
 {
     scanf("%c\n", &ch);
     if (ch == '#')  return 0;

     if (ch == 'N')
         aspect = N;
     else
     if (ch == 'E')
         aspect = E;
     else
     if (ch == 'S')
         aspect = S;
     else
         aspect = W;

     char str[53];

     gets(str);


     for ( i = 0, j = 0; i < 52; i+=2)
     {
         card[j].suit = str[i];
         card[j].rank = str[i+1];
         card[j].dir = (aspect+j+1)%4;
         j++;
     }
     gets(str);
     for ( i = 0; i < 52; i+=2)
     {
         card[j].suit = str[i];
         card[j].rank = str[i+1];
         card[j].dir = (aspect+j+1)%4;
         j++;
     }

     for ( i = 0; i < 52; i++)
         assign(card[i]);

     printf("S:");   print(S);   printf("\n");
     printf("W:");   print(W);   printf("\n");
     printf("N:");   print(N);   printf("\n");
     printf("E:");   print(E);   printf("\n");

 }
 return 0;
}

void assign(Card p)
{
 int x = index(p.rank);
 if (p.suit == 'C')
     arr[0][x] = p.dir;
 else
 if (p.suit == 'D')
     arr[1][x] = p.dir;
 else
 if (p.suit == 'S')
     arr[2][x] = p.dir;
 else
 if (p.suit == 'H')
     arr[3][x] = p.dir;
}

int index(char ch)
{
 if (ch >= '2' && ch <= '9')
     return ch-'0'-2;
 if (ch == 'T')
     return 8;
 if (ch == 'J')
     return 9;
 if (ch == 'Q')
     return 10;
 if (ch == 'K')
     return 11;
 if (ch == 'A')
     return 12;
}
void print(int turn)
{
 int i, j;
 for ( i = 0; i < 4; i++)
     for ( j = 0; j < 13; j++)
         if (arr[i][j] == turn)
         {
             if (i == 0)
                 printf(" C");
             else
             if (i == 1)
                 printf(" D");
             else
             if (i == 2)
                 printf(" S");
             else
             if (i == 3)
                 printf(" H");
             printf("%c", reverse(j));
         }
}

char reverse(int index)
{
 if (index >= 0 && index <= 7)   return index+'2';
 if (index == 8)  return 'T';
 if (index == 9)  return 'J';
 if (index == 10) return 'Q';
 if (index == 11) return 'K';
 if (index == 12) return 'A';
}