给定一个整数数组 nums
,其中恰好有两个元素只出现一次,其余所有元素均出现两次。 找出只出现一次的那两个元素。你可以按 任意顺序 返回答案。
进阶:你的算法应该具有线性时间复杂度。你能否仅使用常数空间复杂度来实现?
示例 1:
输入:nums = [1,2,1,3,2,5] 输出:[3,5] 解释:[5, 3] 也是有效的答案。
示例 2:
输入:nums = [-1,0] 输出:[-1,0]
示例 3:
输入:nums = [0,1] 输出:[1,0]
提示:
2 <= nums.length <= 3 * 104
-231 <= nums[i] <= 231 - 1
- 除两个只出现一次的整数外,
nums
中的其他数字都出现两次
class Solution:
def singleNumber(self, nums: List[int]) -> List[int]:
eor = 0
for x in nums:
eor ^= x
lowbit = eor & (-eor)
ans = [0, 0]
for x in nums:
if (x & lowbit) == 0:
ans[0] ^= x
ans[1] = eor ^ ans[0]
return ans
class Solution {
public int[] singleNumber(int[] nums) {
int eor = 0;
for (int x : nums) {
eor ^= x;
}
int lowbit = eor & (-eor);
int[] ans = new int[2];
for (int x : nums) {
if ((x & lowbit) == 0) {
ans[0] ^= x;
}
}
ans[1] = eor ^ ans[0];
return ans;
}
}
/**
* @param {number[]} nums
* @return {number[]}
*/
var singleNumber = function (nums) {
let eor = 0;
for (const x of nums) {
eor ^= x;
}
const lowbit = eor & -eor;
let ans = [0];
for (const x of nums) {
if ((x & lowbit) == 0) {
ans[0] ^= x;
}
}
ans.push(eor ^ ans[0]);
return ans;
};
class Solution {
public:
vector<int> singleNumber(vector<int>& nums) {
long long eor = 0;
for (int x : nums) eor ^= x;
int lowbit = eor & (-eor);
vector<int> ans(2);
for (int x : nums)
if ((x & lowbit) == 0) ans[0] ^= x;
ans[1] = eor ^ ans[0];
return ans;
}
};
func singleNumber(nums []int) []int {
eor := 0
for _, x := range nums {
eor ^= x
}
lowbit := eor & (-eor)
ans := make([]int, 2)
for _, x := range nums {
if (x & lowbit) == 0 {
ans[0] ^= x
}
}
ans[1] = eor ^ ans[0]
return ans
}