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,cou=0,p;
    scanf("%d",&n);
    char t[n][256];
    for(int i=0;i<n;i++){
        char s[256];
        scanf("%s",s);
        p=0;
        for(int ii=0;ii<cou;ii++){
            if(strcmp(t[ii],s)==0){
                p=1;
                break;
            }
        }
        if(p==0){
            strcpy(t[cou],s);
            cou++;
        }
    }
    printf("%d",cou);
    return 0;
}