Please,help!My program out 3 in example,maybe,as in a test #1,but i have WA!


# include <string.h>
# include <iostream.h>
#include <stdio.h>
int main()
{
char a[100][31];
int b[100];
int N,i,j,k,h,counter;
cin>>N;
counter=0;
if (0<=N && 1000>=N)
{
  for (i=0;i<N;i++)
  {
   cin.getline(a[i],1000);
   //j++;
   cin>>a[i][j];
   b[i]=1;
  }
  for (i=0;i<N;i++)
  {
    b[i]=0;
    for (j=i;j<N;j++)

      if ((strcmp(a[i],a[j])==0)&&(b[j]==1))
      {
    counter++;
        b[j]=0;
      }


  }
//printf("%d\n",counter);
counter++;
cout<<counter<<endl;
}
return 0;
}