Problem:
Score : 300 points

Problem Statement

You drew lottery N times. In the i-th draw, you got an item of the kind represented by a string S_i.

How many kinds of items did you get?

Constraints

1 \leq N \leq 2\times 10^5

S_i consists of lowercase English letters and has a length between 1 and 10 (inclusive).

Input

Input is given from Standard Input in the following format:

N
S_1
:
S_N

Output

Print the number of kinds of items you got.

Sample Input 1

3
apple
orange
apple

Sample Output 1

2

You got two kinds of items: apple and orange.

Sample Input 2

5
grape
grape
grape
grape
grape

Sample Output 2

1

Sample Input 3

4
aaaa
a
aaa
aa

Sample Output 3

4

Solution in C (GCC 9.2.1) (judge verdict: Wrong Answer)

#include<stdio.h>
#include <string.h>
int main()
{
   
   int n;
   int count;
   int mainasu;
   int tmp;
   int skip;
   char tmp_s[1][11];
   char s[100001][11];
   scanf("%d",&n);
   //count=n*2;
   for(int i=0;i<n-skip;i++){
       scanf("%s" ,tmp_s[0]);
       tmp=0;
       for(int j=0;j<i;j++){
           if(strcmp(s[j],tmp_s[0])==0){
                    
                    tmp=1;
                    break;
                }
        }
        if(tmp==1){
            skip++;
        }else{
            printf("i %d i-skip %d\n",i,i-skip);
            snprintf(s[i-skip],11, "%s",tmp_s[0]);
            count++;
        }

   }
   //count+=n;
   printf("%d",count);
   return 0;
}