diff --git a/src/main.rs b/src/main.rs
index efcba29..e09a05a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,35 +2,18 @@ use std::cmp::max;
 
 struct Solution;
 impl Solution {
-    pub fn longest_subarray(nums: Vec<i32>) -> i32 {
-        let mut ans = 0;
-        let mut ans_val = 0;
-        let mut last = 0;
-        let mut count = 0;
-        for i in 0..nums.len() {
-            if nums[i] != last {
-                if ans_val < last {
-                    ans_val = last;
-                    ans = count;
-                }else if ans_val == last {
-                    ans = max(count,ans);
-                }
-                last = nums[i];
-                count = 1;
-            } else {
-                count += 1;
-            }
+    pub fn does_valid_array_exist(derived: Vec<i32>) -> bool {
+        let mut a = 0;
+        let mut b = 1;
+        for i in derived.iter() {
+            a ^= i;
+            b ^= i;
         }
-        if ans_val < last {
-            ans = count;
-        }else if ans_val == last {
-            ans = max(count,ans);
-        }
-        ans
+        a == 0 || b == 1
     }
 }
 
 fn main() {
-    let sl = Solution::longest_subarray(vec![96317,96317,96317,96317,96317,96317,96317,96317,96317,279979]);
+    let sl = Solution::does_valid_array_exist(vec![1,1,0]);
     println!("{:?}", sl);
 }