Special thanks to@jianchao.li.fighterfor adding this problem and creating all test cases. Subscribeto see which companies asked this question 解法1:不考虑常数空间复杂度的限制,一个简单的解法是初始化一个n+1个元素的vector<int> v(n+1,-1),然后遍历输入数组,将v对应下标处的值设为输入数组当前值。...
268. Missing Number 1. Question: 268. Missing Number url : https://leetcode.com/problems/missing-number/ Given an array containingndistinct numbers taken from0, 1, 2, ..., n, find the one that is missing from the array. Example 1: Input: [3,0,1] Output: 2 Example 2: Input: [...
CodeTestcase Test Result Test Result 1539. Kth Missing Positive Number Easy Topics Companies Hint Given an array arr of positive integers sorted in a strictly increasing order, and an integer k. Return the kth positive integer that is missing from this array. Example 1: Input: arr = [2...
Even my first solution is right, there are many roomforimproving it regarding the elegance of code.1. When we use slide window, "i" is actually the end boundary of slide window. We don't need to maintain a end variable. And we always measure the window, after it was adjusted into va...
https://leetcode.com/problems/kth-missing-positive-number/solutions/779999/java-c-python-o-logn/ My two cents on thought process for binary search: Here we have three sorted sequences: let n be len(A), then 1st sorted sequence is array values: ...
Subscribeto see which companies asked this question 1publicclassSolution {2publicintmissingNumber(int[] nums) {3intxor = 0;4for(inti = 0; i< nums.length;i++){5xor ^= i^nums[i];6}7returnxor^nums.length;8}9} 异或 两次,即可得最后缺少的元素。