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...
Given an arraynumscontainingn+ 1 integers where each integer is between 1 andn(inclusive), prove that at least one duplicate number must exist. Assume that there is only one duplicate number, find the duplicate one. Note: You must not modify the array (assume the array is read only). Yo...
Find the Duplicate Number 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, find the duplicate one. Note: You must not modify the array (as...
We start with splitting the string and collecting all words in aList. Then we use theHashSet.add()method to check if the word is unique or duplicate. List<String>wordsList=Arrays.asList(sentence.split(" "));Set<String>tempSet=newHashSet<>();List<String>duplicateWords=newArrayList<>();...
AC Java: 1publicclassSolution {2publicintfindDuplicate(int[] nums) {3if(nums ==null|| nums.length == 0){4thrownewIllegalArgumentException("Invalid input array.");5}67//walker and runner can't start at the same point8//or while loop condition walker != runner is never used9//while...
class Solution: """ @param nums: an array containing n + 1 integers which is between 1 and n @return: the duplicate one """ def findDuplicate(self, nums): # write your code here nums.sort() for i in range(len(nums)): if nums[i] == nums[i + 1]: return nums[i] 赞同 31...
importjava.util.Arrays;/** * A Java program to find the second-largest number in an array * using Arrays.sort() method. * * @author coderolls.com */publicclassSecondLargestElementInArrayUsingArrays{publicstaticvoidmain(String[]args){int[]arr={2,5,9,8,11,18,13};intsecondLargest=getSec...
Repeat until all characters in the array have been iterated. Check map.Duplicate charactershave the count of more than 1. Distinct characterswill have the count as 1. 1.2. Java Program publicstaticMap<Character,Integer>getCharBag(Stringinput){Map<Character,Integer>map=newHashMap<>();if(input=...
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