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kt: add «1863. Sum of All Subset XOR Totals»

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Signed-off-by: Matej Focko <me@mfocko.xyz>
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Matej Focko 2024-05-20 15:47:02 +02:00
parent 1ef3050db6
commit 928354c370
Signed by: mfocko
GPG key ID: 7C47D46246790496
1 changed files with 18 additions and 0 deletions
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kt/sum-of-all-subset-xor-totals.kt Normal file
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class Solution {
private fun xorSum(
nums: IntArray,
i: Int,
sum: Int,
): Int {
if (i == nums.size) {
return sum
}
val including = xorSum(nums, i + 1, sum xor nums[i])
val excluding = xorSum(nums, i + 1, sum)
return including + excluding
}
fun subsetXORSum(nums: IntArray): Int = xorSum(nums, 0, 0)
}