import java.io.*;
import java.util.*;
import java.text.*;

public class count {
    public static final String PROBLEM = "count";
    
    BufferedReader in;
    PrintWriter out;

    public static void main(String[] args) throws Exception {
	new count().run();
    }

    void run() throws Exception {
	in = new BufferedReader(new FileReader(PROBLEM+".in"));

	try {
	    out = new PrintWriter(new BufferedWriter(new FileWriter(PROBLEM+".out")));
	    try {
		solve();
	    } finally {
                out.close();
            }
        } finally {
            in.close();
        }
    }

    void solve() throws Exception {
        int count=0;
        for (;;) {
            String line = in.readLine();
            if (line == null) break;
            ++count;
        }
	out.println(count);
    }
}