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(){
    int n;
    unsigned char s[200001][10];
    char tmp[10];
    int count=0;

    scanf("%d",&n);

    for(int i=0;i<n;i++){
        scanf("%s",s[i]);
    }

    for(int j=1;j<n;j++){
        for(int t=1;t<n;t++){
            if((strcmp(s[t-1],s[t]))<=0){
            strcpy(tmp,s[t]);
            strcpy(s[t],s[t-1]);
            strcpy(s[t-1],tmp);
            }
        }
    }

    for(int k=0;k<n;k++){
        if((strcmp(s[k],s[k+1]))==0)count++;
    }
    printf("%d",n-count);
}