2419. 按位与最大的最长子数组

src/main.rs

@@ -1,79 +1,36 @@
-use std::ops::{AddAssign, SubAssign};
+use std::cmp::max;
 
-struct XorVal {
-    data: Vec<i32>,
-    count: usize,
-}
-impl XorVal {
-    pub fn new() -> Self {
-        XorVal { data: vec!(0; 32), count: 0 }
-    }
-    pub fn get_val(&self) -> i32 {
-        if self.count == 0 {
-            return -1;
-        }
-        let mut ans = 0;
-        for i in 0..32 {
-            if self.data[i] > 0 {
-                ans |= 1 << i;
-            }
-        }
-        ans
-    }
-}
-impl AddAssign<i32> for XorVal {
-    fn add_assign(&mut self, mut x: i32) {
-        self.count += 1;
-        let mut i = 0;
-        while x > 0 {
-            if x & 1 == 1 {
-                self.data[i] += 1;
-            }
-            x >>= 1;
-            i += 1;
-        }
-    }
-}
-impl SubAssign<i32> for XorVal {
-    fn sub_assign(&mut self, mut x: i32) {
-        self.count -= 1;
-        let mut i = 0;
-        while x > 0 {
-            if x & 1 == 1 {
-                self.data[i] -= 1;
-            }
-            x >>= 1;
-            i += 1;
-        }
-    }
-}
 struct Solution;
 impl Solution {
-    pub fn smallest_subarrays(nums: Vec<i32>) -> Vec<i32> {
+    pub fn longest_subarray(nums: Vec<i32>) -> i32 {
-        let mut ans = vec![0; nums.len()];
+        let mut ans = 0;
-        let mut xor = vec![0; nums.len()];
+        let mut ans_val = 0;
-        xor[nums.len() - 1] = nums[nums.len() - 1];
+        let mut last = 0;
-        for i in (0..nums.len() - 1).rev() {
+        let mut count = 0;
-            xor[i] = xor[i + 1] | nums[i];
-        }
-        let mut xor_val = XorVal::new();
-        let (mut l, mut r) = (0, 0);
         for i in 0..nums.len() {
-            while l < i && l <= r {
+            if nums[i] != last {
-                xor_val -= nums[l];
+                if ans_val < last {
-                l += 1;
+                    ans_val = last;
+                    ans = count;
+                }else if ans_val == last {
+                    ans = max(count,ans);
                 }
-            while xor_val.get_val() < xor[i] {
+                last = nums[i];
-                xor_val += nums[r];
+                count = 1;
-                r += 1;
+            } else {
+                count += 1;
             }
-            ans[i] = (r - l) as i32;
+        }
+        if ans_val < last {
+            ans = count;
+        }else if ans_val == last {
+            ans = max(count,ans);
         }
         ans
     }
 }
 
 fn main() {
-    let sl = Solution::smallest_subarrays(vec![0]);
+    let sl = Solution::longest_subarray(vec![96317,96317,96317,96317,96317,96317,96317,96317,96317,279979]);
     println!("{:?}", sl);
 }