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: Wrong Answer)

	import java.util.Scanner;
//int[] date=new int[2];
public class Main {
int i,o,sum,h,s,e,u,ty,yu,ui,n,num,qw;
double m,t,r,j,k,f,d,g,w;
static double l;
String b,c,z,x,v,a,q;
Scanner scan =new Scanner(System.in);
//入力
	public void input() {	
	
	}
	//演算
	public void compute() {
	
		}
//出力
	public void output() {
		sum=1;
h=scan.nextInt();
String[] date=new String[h];
	for(o=0;o<h;o++) {
		date[o]=scan.next();
	}
u=1;
sum=1;
	for(o=0;o<h-1;o++){	
		
      for(e=u;e<h;e++){
			if(date[o].equals(date[e])) {
				
			}else {	
				s+=1;
			
			}
      }
      u+=1;
    }
	s/=2;
	sum+=s;
System.out.println(sum);
		}
	public static void main(String [ ] args) {
		Main p = new  Main ();
		p.input();
		p.compute();
		p.output();
		}
	}