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: Wrong Answer)

#include <stdio.h>

int main(){

    int N;
    scanf("%d",&N);
    char S[10]="0";
    int arr[N];
    for(int i=0; i<N; i++){
        arr[i]=0;
    }

    for(int i=0; i<N; i++){
        scanf("%s",S);
        sscanf(S,"%d",&arr[i]);
    }

    int p = sizeof(arr)/sizeof(arr[0]);
    int res=1;
    for(int i=0; i<p; i++){
        for(int j=0; j<i; j++){
            if(arr[i]==arr[j]){
                res++;   
            }
        }
    }

    printf("%d\n",res);


    return 0;

}