+---------------------------------------------------------------+
|import java.io.*;                                              |
|public class lc { // "LC"                                      |
|    public static void main(String args[]) throws IOException {|
|        BufferedReader in = new BufferedReader(                |
|            new InputStreamReader(System.in));                 |
|                                                               |
|        String line;  int count = 0;                           |
|        while ((line = in.readLine()) != null)                 |
|            count++;                                           |
|                                                               |
|        System.out.println(count);                             |
|        }                                                      |
|    }                                                          |
+---------------------------------------------------------------+