23 lines
452 B
Go
23 lines
452 B
Go
// Package q137 implements a solution for https://leetcode.com/problems/single-number-ii/
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package q137
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func singleNumber(nums []int) int {
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bitCounts := make([]uint8, 32)
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for _, num := range nums {
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num32 := int32(num)
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for i := range 32 {
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if num32|1<<i == num32 {
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bitCounts[i] = (bitCounts[i] + 1) % 3
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}
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}
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}
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var ret int32
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for i := range 32 {
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if bitCounts[i] != 0 {
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ret |= 1 << i
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}
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}
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return int(ret)
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}
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var _ = singleNumber
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