# 1927. Count

This problem is strictly to acclimate teams to the contest environment. We strongly suggest you first finish this problem, and then attempt the more complex practice problem.

### 输入格式

The input file will contain an unknown number of lines with at most 100 characters on each line. All the characters will be printable ASCII characters. Note that the input file will always exist, but may be empty.

### 输出格式

The number of lines in the input file.

### 样例

Input
one
and two
three

Output
3


109 人解决，122 人已尝试。

135 份提交通过，共有 196 份提交。

2.0 EMB 奖励。