/**
* @param {number[]} nums
* @return {number}
*/
var singleNumber = function(nums) {
let ans = 0
for (const num of nums) {
ans ^= num
}
return ans
};ๆฌข่ฟ้่ฟใ้ฎไปถใๆ่
็นๅปใ่ฟ้ใๅ่ฏๆไฝ ็ๆณๆณ
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