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: Runtime Error)

#include <stdio.h>
#include <string.h>

int main(void){
  int n,i,j,t=0,f;
  char s[11],cmp[200000][11];
  
  scanf("%d",&n);
  
  for(i = 0; i <= n; i++){
    scanf("%s",s);
    for(j = 0; j <= t; j++){
      if(strcmp(s,cmp[j]) == 0){
        break;
      }
      strcpy(cmp[t],s);
      t++;
    }
  }
  
  return 0;
}