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Go-StudyExample/leetCode/simple/SingleNum/SingleNumber_test.go
T

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/*
* @Author : huangzj
* @Time : 2020/12/24 9:24
* @Description
*/
package SingleNum
import (
"fmt"
"testing"
)
type SingleNumber struct{}
func (SingleNumber) Description(string) string {
return `
给定一个非空整数数组,除了某个元素只出现一次以外,其余每个元素均出现两次。找出那个只出现了一次的元素。
说明:
你的算法应该具有线性时间复杂度。 你可以不使用额外空间来实现吗?
示例 1:
输入: [2,2,1]
输出: 1
示例 2:
输入: [4,1,2,1,2]
输出: 4
`
}
func singleNumber(nums []int) int {
var result int
for _, num := range nums {
result = result ^ num
}
return result
}
func TestSingleNumber(t *testing.T) {
fmt.Println(singleNumber([]int{2, 2, 1}))
fmt.Println(singleNumber([]int{4, 1, 2, 1, 2}))
}