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;
    scanf("%d",&n);
    int a[n];
    
    for(int i=0;i<n;i++)
    {
        char s[20];
        scanf("%s",&s);
        a[i]=strlen(s);

    }
    
    int len=a[0],count=1;;
    
    for(int i=1;i<n;i++)
    {
        if(len!=a[i])
            count++;
            
    }
    
    printf("%d",count);

    return 0;
}