这道题给了我们一个数组,数组中的数字可能出现一次或两次,让我们找出所有出现两次的数字,由于之前做过一道类似的题目Find the Duplicate Number,所以不是完全无从下手。这类问题的一个重要条件就是1 ≤ a[i] ≤ n (n = size of array),不然很难在O(1)空间和O(n)时间内完成。首先来看一种正负替换的方法...
There is only one duplicate number in the array, but it could be repeated more than once. 题目标签:Array, Binary Search, Two Pointers 题目给了我们一个nums array, 让我们找到其中的重复数字。因为这一题有4个条件,所以有难度。1. 要求我们不能改动array;2. 只能用O(1)空间;3. 时间要小于O(n^2...
Note: You must not modify the array (assume the array is read only). You must use only constant, O(1) extra space. Your runtime complexity should be less thanO(n2). There is only one duplicate number in the array, but it could be repeated more than once 非常好的题目,开始是用二分...
There is only one duplicate number in the array, but it could be repeated more than once. 思路: 不能修改数组所以不能排序,不能用额外的空间所以不能用HashMap,考虑鸽巢原理。数的范围在1~n之间,有n+1个数 猜测重复数为n/2,计算 数组中大于n/2的次数count,如果重复的数在n/2~n之间的话,count应...
Note: You must not modify the array (assume the array is read only). You must use only constant, O(1) extra space. Your runtime complexity should be less than O(n2). There is only one duplicate number in the array, but it could be repeated more than once. ...
There is only one duplicate number in the array, but it could be repeated more than once. 解题思路 将数组的索引作为地址,存入数组的元素作为值,每个数组单元作为一个节点 由于不存在值为 0 的节点,因此构成的节点一定不会在首节点形成环 由于值中存在重复元素,因此构成的链表一定存在重复的节点指向同一个...
Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number must exist. Assume that there is only one duplicate number, …
class Solution: def findDuplicate(self, nums: List[int]) -> int: # 二分区间左边界,初始化为 1 l: int = 1 # 二分区间右边界,初始化为 n r: int = len(nums) - 1 # 当前区间不为空时,继续二分 while l <= r: # 计算区间中点 mid mid: int = (l + r) >> 1 # 统计 nums 中小...
[LeetCode] Find the Duplicate Number 寻找重复数 Given an arraynumscontainingn+ 1 integers where each integer is between 1 andn(inclusive), prove that at least one duplicate element must exist. Assume that there is only one duplicate number, find the duplicate one....
There is only one duplicate number in the array, but it could be repeated more than once. 描述 给定一个包含 n + 1 个整数的数组 nums,其数字都在 1 到 n 之间(包括 1 和 n),可知至少存在一个重复的整数。假设只有一个重复的整数,找出这个重复的数。