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: Runtime Error)

#include<stdio.h>
#include<string.h>

int main(void){
    int a,b,i,j,k=0,l[11],m,n=0;
    scanf("%d",&a);
    char c[a][11],d[a][11];
    for(i=0;i<a;i++){
        scanf("%s",c[i][11]);
        for(j=0,n=0;j<=k;j++){
            m=strcmp(c[i][11],d[j][11]);
            if(m==0){
                j=k;
                n=1;
            }
        }
        if(n==0){
            strcpy(d[k][11],c[i][11]);
            k++;
        }
    }
    printf("%d",k);
}