题目描述
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-----
3
apple
orange
apple
-----Sample Output-----
2
You got two kinds of items: apple and orange.
输入格式
见题面
输出格式
见题面
样例输入
3
apple
orange
apple
样例输出
2