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: Time Limit Exceeded)

#include<stdio.h>
#include<string.h>
int main(void)
{
    int n,count=0,judge;
    char kigou;
    scanf("%d",&n);
    scanf("%c",&kigou);
    char s[11],d[n][11];
    for(int i=0;i<n;i++)
    {
        judge = 0;
        gets(s);
        for(int j=0;j<count;j++)
        {
            if(strcmp(s,d[j])==0)
            {
                judge=1;
                break;
            }
        }
        if(judge==0)
        {
            strcpy(d[count],s);
            count++;
        }
    }
    printf("%d",count);
}