pengweixuan008的博客

题目：Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every eleme

You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping you from robbing each of them is that adjacent house

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.思路：方法一：将数组排序，最中间的那个数就是您要找的数。方法二：用了两个辅助变量。       k用于临时存储数组中的数

题目：A peak element is an element that is greater than its neighbors.Given an input array where num[i] ≠ num[i+1], find a peak element and return its index.The array may contain multiple p

Given an array of integers, every element appears twice except for one. Find that single one.代码：public class Solution {    public int singleNumber(int[] nums) {        HashMap map = new Hash

Given an array of integers, find two numbers such that they add up to a specific target number.Input: numbers={2, 7, 11, 15}, target=9Output: index1=1, index2=2代码：public class Solution