Counterfeit Dollar

http://poj.org/problem?id=1013

 #include<stdio.h>
 #include<string.h>
 #include<math.h>
 const int INF=<<;
 int main()
 {
     char rw[][],lw[][],vis[][];
     int ans[],t;
     scanf("%d",&t);
     while(t--)
     {
         memset(ans,,sizeof(ans));
         for (int i = ; i < ; i ++)
         {
             scanf("%s %s %s",lw[i],rw[i],vis[i]);
         }
         for (int i = ; i < ; i ++)
         {
             if(vis[i][]=='e')
             {
                 for (int j = ; lw[i][j]!='\0'; j ++)
                 {
                     ans[lw[i][j]-'A'] = INF;
                     ans[rw[i][j]-'A'] = INF;
                 }
             }
         }
         for (int i  = ; i < ; i ++)
         {
 
             for (int j = ; lw[i][j]!='\0'; j ++)
             {
                 if (vis[i][]=='u')
                 {
 
                     if(ans[lw[i][j]-'A'] != INF)
                     {
                         ans[lw[i][j]-'A']++;
                     }
                     if(ans[rw[i][j]-'A'] != INF)
                     {
                         ans[rw[i][j]-'A']--;
                     }
                 }
 
                 else if (vis[i][]=='d')
                 {
 
                     if(ans[lw[i][j]-'A'] != INF)
                     {
                         ans[lw[i][j]-'A']--;
                     }
                     if(ans[rw[i][j]-'A'] != INF)
                     {
                         ans[rw[i][j]-'A']++;
                     }
                 }
                 else
                     break;
             }
         }
         int max = ,pos;
         for (int i = ; i <= 'L'-'A'; i ++)
         {
             if (ans[i]!=INF)
             {
                 if(fabs(ans[i]) > max)
                 {
                     max = fabs(ans[i]);
                     pos = i;
                 }
             }
         }
         if(ans[pos] <= )
             printf("%c is the counterfeit coin and it is light.\n",pos+'A');
         else
             printf("%c is the counterfeit coin and it is heavy.\n",pos+'A');
     }
     return ;
 
 }