package zpliku;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

import javax.swing.JOptionPane;

public class Main {

	public static void main(String[] args) {

		parzyste();
		tylesamo();

	}
	public static void parzyste() {
		int count=0;
		  int c = 0;
          int t=0;

          int j=0;
		 try {
	            Scanner input = new Scanner(System.in);
	            File file = new File("plik.txt");

	            input = new Scanner(file);


	            while (input.hasNextLine()) {
	                String line = input.nextLine();
	                //System.out.println(line);
	                if(line.length()%2==0) count++;

	            }
	            System.out.println(count);


	            input.close();

	        } catch (Exception ex) {
	            ex.printStackTrace();
	        }
	    }
	public static void tylesamo(){

	  int c = 0;
    int t=0;
    int j=0;
	 try {
          Scanner input = new Scanner(System.in);
          File file = new File("plik.txt");

          input = new Scanner(file);


          while (input.hasNextLine()) {
              String line = input.nextLine();
              //System.out.println(line);
              for(int i=0; i<line.length(); i++){
              	if (line.charAt(i) == '0') c++;
              	if (line.charAt(i) == '1') j++;

              }
              if(c==j) t++;
              c=0; j=0;

          }


          System.out.println(t);

          input.close();

      } catch (Exception ex) {
          ex.printStackTrace();
      }
  }
}