classSolution {public:intsingleNonDuplicate(vector<int>&nums) {intleft =0, right = nums.size() -1, n =nums.size();while(left <right) {intmid = left + (right - left) /2;if(nums[mid] == nums[mid +1]) {if((n -1- mid) %2==1) right =mid;elseleft = mid +1; }else{i...
第二种方法就是通过对2*n取long保存完整数值用于下面的计算。 classSolution {publicintarrangeCoins(intn) {return(int)(Math.sqrt((long)2*n+0.25) - 0.5);//return (int)(Math.sqrt(2) * Math.sqrt(n + 0.125) - 0.5);} } leetcode 540 这道题主要是由于数值的排列具有一定的规律性和特色。 始...
Given a sorted array consisting of only integers where every element appears twice except for one element which appears once. Find this single element that appears only once. Example 1: Input:[1,1,2,3,3,4,4,8,8]Output:2 Example 2: Input:[3,3,7,7,10,11,11]Output:10 分析: 这道...
LeetCode 0540. Single Element in a Sorted Array有序数组中的单一元素【Medium】【Python】【二分】 Problem LeetCode You are given a sorted array consisting of only integers where every element appears exactly twice, except for one element which appears exactly once. Find this single element that ...
Can you solve this real interview question? Single Element in a Sorted Array - You are given a sorted array consisting of only integers where every element appears exactly twice, except for one element which appears exactly once. Return the single eleme
Given a sorted array consisting of only integers where every element appears twice except for one element which appears once. Find this single element that appears only once. Example 1: AI检测代码解析 Input: [1,1,2,3,3,4,4,8,8]
如果nums[2 * mid] != nums[2 * mid + 1],那么说明单独的元素一定在前半段,否则就在后半段。这个题的官方题解写的很详细,我参考了方法三。 时间O(logn) 空间O(1) Java实现 1classSolution {2publicintsingleNonDuplicate(int[] nums) {3intstart = 0;4intend = nums.length / 2;5while(start ...
【leetcode】540. Single Element in a Sorted Array 题目如下: 解题思路:题目要求时间复杂度是O(logN),可以尝试使用二分查找法。首先数组是有序的,而且仅有一个元素出现一次,其余均为两次。我们可以先找到数组最中间的元素,记为mid。如果mid和mid-1以及mid+1都不相同,那么mid就是single number。如果mid和mid-...
【leetcode】540. Single Element in a Sorted Array 题目如下: 解题思路:题目要求时间复杂度是O(logN),可以尝试使用二分查找法。首先数组是有序的,而且仅有一个元素出现一次,其余均为两次。我们可以先找到数组最中间的元素,记为mid。如果mid和mid-1以及mid+1都不相同,那么mid就是single number。如果mid和mid-...
LeetCode 136:只出现一次的数字 Single Number 题目: 给定一个非空整数数组,除了某个元素只出现一次以外,其余每个元素均出现两次。找出那个只出现了一次的元素。 Given anon-emptyarray of integers, every element appearstwiceexcept for one. Find that single one....