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 Java (OpenJDK 11.0.6) (judge verdict: Runtime Error)

//import java.util.Scanner;
public class Main{
	public static void main(String[] args){
		//Scanner sc = new Scanner(System.in);
		//int N = sc.nextInt();
		int N = new java.util.Scanner(System.in).nextInt();
		int count = 1;
		String[] st = new String[N];
		for (int i =0; i < N; i++){
			//String string = sc.next();
			String string = new java.util.Scanner(System.in).nextLine();
			st[i] = string;
			for (int j = 0; j < i; j++){
				if (st[i].equals(st[j])){
					break;
				}
				else{
					count++;
				}
			}
		}
		System.out.println(count);
	}
}