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(void)
{
  int N, counter = 0, count1, kind = 1;
  scanf("%d",&N);

  char S[N][11];
  while(counter < N){
    scanf("%s",S[counter]);
    counter++;
  }

  for(count1 = 1; count1 < N; count1++){
    if(strcmp(S[0],S[count1]) != 0){
        kind++;
    }
  }

  printf("%d\n", kind);

  return 0;
}