#268. Missing Number
https://leetcode.com/problems/missing-number/description/?envType=daily-question&envId=2024-02-21
/**
* @param {number[]} nums
* @return {number}
*/
var missingNumber = function(nums) {
let len = nums.length
nums = nums.sort((a,b) => a - b)
const diff = nums.length + 1 - nums.length
if (nums[0] !== 0) return 0
for (let i = 0; i < nums.length; i++) {
if ((nums[i + 1] - nums[i]) !== diff) return diff + nums[i]
}
};
ย