查找0~n缺失的数。 首先可以先对数组排序,然后线性查找。时间复杂度是O(nlogn + n),不满足题意但是也可以AC。 publicclassSolution {publicintmissingNumber(int[] nums) { Arrays.sort(nums);if(nums[0] != 0) {return0; }for(inti=0; i<nums.length-1; i++) {if(nums[i] + 1 != nums[i+...
Runtime:160 ms, faster than30.48% of Python3 online submissions for Missing Number. Memory Usage:15.1 MB, less than39.86% of Python3 online submissions for Missing Number. 【解法二】 思路同上,另一种写法 classSolution:defmissingNumber(self, nums): nums.sort()#Ensure that n is at the last ...
这就是 LeetCode 136 - Single Number 这题,所以我们可以采用相同的异或解法。 因为a ^ a = 0 ,所以出现两次的数异或后会相互抵消。 那么求所有数的异或和即可,最后剩余的就是只出现一次的数。 时间复杂度:O(n) 需要遍历处理全部 O(n) 个数 空间复杂度:O(1) 只需要维护常数个额外变量即可 代码(Python...
leetcode.com/problems/missing-number/ 方法一:数学公式: class Solution { public: int missingNumber(vector<int>& nums) { int N=nums.size(); int sum=0; for(int i=0;i<N;i++) sum += nums[i]; return N*(N+1)/2 - sum; } }; 但是如果N很大,上面求和可能会溢出。于是下面: ...
2、代码实现 public class Solution { public int missingNumber(int[] nums) { if (nums == null) { return 0; } int result = 0; Map<Integer,Integer>map = new HashMap<Integer,Integer>(); for (int i = 0; i < nums.length; ++i) { ...
【leetcode】268. Missing Number problem 268. Missing Number solution1:等差数列求和公式 根据题意,(0, 1, 2,...,n),共有(n+1)个数,丢失了一个数之后,剩余的数组成的数组,求解丢失的数据。 等差数列求和减去数组累加和得到的结果即为所求数据。
简介:LeetCode之Missing Number 1、题目 Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array. For example, Given nums = [0, 1, 3] return 2. Given nums = [0] return 1 ...
public class Solution { public int missingNumber(int[] nums) { //首先对数组进行排序 Arrays.sort(nums); int startData=nums[0]; for(int i=1;i<nums.length;i++) { //检查数组是否连续 if((startData+1)==nums[i]) { startData=nums[i]; ...
public class Solution { public int missingNumber(int[] nums) { Arrays.sort(nums); int min = 0, max = nums.length - 1; while(min < max){ int mid = (min + max) / 2; // 没错位,在右边。有错位,则在左边 if(mid == nums[mid]){ ...
LeetCode Username endlesscheng Problem Number, Title, and Link Separate Squares II https://leetcode.com/problems/separate-squares-ii/description/ Bug Category Missing test case (Incorrect/Inefficient Code getting accepted because of miss...