java代码如下: publicclassSolution {publicintmissingNumber(int[] nums) {intsum = nums.len * (nums.len + 1)/2; //length大小是n-1for(inti = 0; i < nums.length; ++i){ sum-=nums[i]; }returnsum; } }
运用异或就行了。 代码如下: publicclassSolution {publicintmissingNumber(int[] nums) {intlength =nums.length;intres = 0;for(inti = 1; i <= length; i++) res^=i;for(inti = 0; i < length; i++) res^=nums[i];returnres; } }...
class Solution { public int missingNumber(int[] nums) { int sum = 0, n=nums.length; for(int i=0; i<nums.length;i++) sum += nums[i]; return (1+n)*n/2-sum; } } 1. 2. 3. 4. 5. 6. 7. 8. 第一次做; 位运算, 异或; 非常巧妙! 核心: 先计算得到123…n的结果res1, ...
代码 public class Solution { public int missingNumber(int[] nums) { int res = 0; for(int i = 0; i <= nums.length; i++){ res ^= i == nums.length ? i : i ^ nums[i]; } return res; } } First Missing Positive Given an unsorted integer array, find the first missing positiv...
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]; ...
LeetCode Username endlesscheng Problem Number, Title, and Link Maximize the Minimum Game Score https://leetcode.com/problems/maximize-the-minimum-game-score/description/ Bug Category Missing test case (Incorrect/Inefficient Code getting ...
classSolution{publicintmissingNumber(int[] nums){intsum=0;intlen=nums.length;for(inti=0; i < len; i++) { sum += nums[i]; }returnlen*(len+1)/2- sum; } } 解法二 思路 用位运算。运用java中的异或来解题。异或性质如下: 1、交换律 ...
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 indexifnums[-1] !=len(nums):returnlen(nums)#Ensure that 0 is at the first inde...
详见:https://leetcode.com/problems/missing-number/description/ Java实现: 方法一: class Solution { public int missingNumber(int[] nums) { int res=nums.length; int i=0; for(int num:nums){ res^=num; res^=i; ++i; } return res; ...
第二遍做法:参考下面一个vimukthi的解答 https://discuss.leetcode.com/topic/18612/accepted-java-solution-with-explanation/3 low 表示next possible missing integer streak的 Leetcode Array/String Corner Cases java i++ 转载 ActionTech 2015-01-26 10:31:00 193阅读 2评论 jre裁剪 纯属个人研究实践...