import java.util.Scanner; public class Main{ public static void main(String[] args){ Scanner s = new Scanner(System.in); while(s.hasNext()){ int n = s.nextInt(); int xor = 0; int count = 0; for(int i = 0; i< n; i++){ int a = s.nextInt(); xor ^= a; if(a == 0 || xor ==0){ count ++; xor =0; } } System.out.println(count); } } }