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>
#include<string.h>

int main(void){
    int times;
    char tmpStr[10];
    char str[200010][10];

    int check=0;
    int checkSame=0;

    //入力部分
    scanf("%d",&times);
    for(int counter=0; counter<times;counter++){
        scanf("%s",str[counter]);
        check++;
        for(int i=0;i<counter;i++){
            if(strcmp(str[counter],str[i])==0){
                printf("%d,%d\n",i,counter);
                checkSame=1;
            }
            if(checkSame==1){
                printf("samestr\n");
                check--;
                checkSame=0;
                break;
            }
        }
    }

    //計算部分

    //出力部分

    //printf("%s\n",str[counter-1]);
    printf("%d\n",check);

    return 0;
}