package 滴滴; import java.util.Scanner; public class Demo1_非空区间 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int[] arr = new int[n]; for (int i = 0; i < arr.length; i++) { arr[i] = sc.nextInt(); } System.out.println(fun(arr)); } private static int fun(int[] arr) { int count = 0; int xor = 0; int pre = 0; for (int i = 0; i < arr.length; i++) { if(arr[i] == 0){ count++; xor = 0; pre = i; continue; }else{ xor = xor ^ arr[i]; if(xor == 0){ count++; pre = i; xor = 0; }else{//否则，从后往前求 异或 int newXor = 0; for (int j = i; j > pre; j--) { newXor = newXor^arr[j]; if(newXor == 0){ count++; pre = i; xor = 0; j = i+1; } } } } } return count; } }