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 Python (3.8.2) (judge verdict: Runtime Error)

num = int(input())
targeta = []
targetb = []
targetc = []
targetd = []
targete = []
targetf = []
targetg = []
targeth = []
targeti = []
targetj = []
hit = 0
for j in range(num):
    check = input()
    long = len(check)
    if long = 1:
        if check not in targeta:
            targeta.append(check)
            hit += 1
    elif long = 2:
        if check not in targetb:
            targetb.append(check)
            hit += 1
    elif long = 3:
        if check not in targetc:
            targetc.append(check)
            hit += 1
    elif long = 4:
        if check not in targetd:
            targetd.append(check)
            hit += 1     
    elif long = 5:
        if check not in targete:
            targete.append(check)
            hit += 1  
    elif long = 6:
        if check not in targetf:
            targetf.append(check)
            hit += 1
    elif long = 7:
        if check not in targetg:
            targetg.append(check)
            hit += 1    
    elif long = 8:
        if check not in targeth:
            targeth.append(check)
            hit += 1
    elif long = 9:
        if check not in targeti:
            targeti.append(check)
            hit += 1
    elif long = 10:
        if check not in targetj:
            targetj.append(check)
            hit += 1                                                           
print(hit)