Class Solution
Hard
Given a (0-indexed) integer array nums
and two integers low
and high
, return the number of nice pairs.
A nice pair is a pair (i, j)
where 0 <= i < j < nums.length
and low <= (nums[i] XOR nums[j]) <= high
.
Example 1:
Input: nums = [1,4,2,7], low = 2, high = 6
Output: 6
Explanation: All nice pairs (i, j) are as follows:
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(0, 1): nums[0] XOR nums[1] = 5
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(0, 2): nums[0] XOR nums[2] = 3
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(0, 3): nums[0] XOR nums[3] = 6
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(1, 2): nums[1] XOR nums[2] = 6
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(1, 3): nums[1] XOR nums[3] = 3
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(2, 3): nums[2] XOR nums[3] = 5
Example 2:
Input: nums = [9,8,4,2,1], low = 5, high = 14
Output: 8
Explanation: All nice pairs (i, j) are as follows:
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(0, 2): nums[0] XOR nums[2] = 13
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(0, 3): nums[0] XOR nums[3] = 11
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(0, 4): nums[0] XOR nums[4] = 8
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(1, 2): nums[1] XOR nums[2] = 12
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(1, 3): nums[1] XOR nums[3] = 10
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(1, 4): nums[1] XOR nums[4] = 9
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(2, 3): nums[2] XOR nums[3] = 6
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(2, 4): nums[2] XOR nums[4] = 5
Constraints:
1 <= nums.length <= 2 * 104
1 <= nums[i] <= 2 * 104
1 <= low <= high <= 2 * 104
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Constructor Summary
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Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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Solution
public Solution()
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Method Details
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countPairs
public int countPairs(int[] nums, int low, int high)
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