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;
    char a[10];
    char s[200001][11];
    int x = 1;

    scanf("%d", &n);
    scanf("%s", s[0]);

    for(int i = 1; i < n - 1; i++){
        scanf("%s", s[i]);
        for(int j = 0; j < i; j++){
            if(strcmp(s[i], s[j]) != 0) x++;
        }
    }
    printf("%d", x);
    }