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 PyPy3 (7.3.0) (judge verdict: Time Limit Exceeded)

n = int(input())
s = []
# for n_str in range (0, n):
#     s[n_str] = input()
s = [input() for n_str in range(n)]

diction = []
comp_list = []
# print(diction[0])
flag = 0

diction.append(s[0])

for cnt in range(n):
    dict_len = len(diction)
    for dict_search in range(dict_len):
        if s[cnt] == diction[dict_search]:
            flag = 1
    if flag == 0:
        diction.append(s[cnt])
    else:
        flag = 0



print(len(diction))