Update 1707-maximum-xor-with-an-element-from-array.js

Author: everthis

1707-maximum-xor-with-an-element-from-array.js

@@ -1,3 +1,53 @@
+/**
+ * @param {number[]} nums
+ * @param {number[][]} queries
+ * @return {number[]}
+ */
+const maximizeXor = function (nums, queries) {
+  nums.sort((a, b) => a - b)
+  const numOfBits = 1 + Math.floor(Math.log2(nums[nums.length - 1]))
+  const maxMask = (1 << numOfBits) - 1
+  return queries.map(([x, m]) => query(x, m))
+  function query(x, m) {
+    if (m < nums[0]) return -1
+    let l = 0,
+      r = nums.length
+    while (l < r) {
+      let mid = l + ((r - l) >> 1)
+      if (m < nums[mid])r = mid
+      else l = mid + 1
+    }
+    r -= 1
+    l = 0
+    let ans = x & ~maxMask
+    for (let bit = numOfBits - 1; bit >= 0; bit -= 1) {
+      const mask = 1 << bit
+      if (x & mask) {
+        if ((nums[l] & mask) === 0) {
+          ans |= 1 << bit
+          r = search(l, r, mask) - 1
+        }
+      } else {
+        if (nums[r] & mask) {
+          ans |= 1 << bit
+          l = search(l, r, mask)
+        }
+      }
+    }
+    return ans
+  }
+  function search(l, r, mask) {
+    while (l <= r) {
+      const m = l + ((r - l) >> 1)
+      if ((nums[m] & mask) === 0) l = m + 1 
+      else r = m - 1
+    }
+    return l
+  }
+}
+
+// another
+
 /**
  * @param {number[]} nums
  * @param {number[][]} queries