To find two numbers whose sum equals the target number 9, in this example, nums[0] = 2 and nums[1] = 7 add up to exactly 9. Therefore, you need to return the indices of these two numbers, which are [0, 1]. This
index)-1; break; } else if(sum < target){ l++; } else { r--; } } return ret; // 用两个指针来扫 } }; // 下面是测试代码 /* int main() { Solution sol; vector<int> arr; arr.push_back(3); arr.push_back(2); arr.push_back(4); vector<int> ret = sol.twoSum(arr, ...
value < b.value; } class Solution { public: vector<int> twoSum(vector<int> &nums, int target) { int len = nums.size(); assert(len >= 2); vector<int> ret(2, 0); // 初始化:ret包含2个值为0的元素 vector<Node> nums2(len); for(int i = 0; i < len; i++){ nums2[i]...
这样我们创建一个哈希表,对于每一个 x,我们首先查询哈希表中是否存在 target - x,然后将 x 插入到哈希表中,即可保证不会让 x 和自己匹配。 class Solution: def twoSum(self, nums: List[int], target: int) -> List[int]: hashtable = dict() for i, num in enumerate(nums): if target - num ...
有了上述两种语言的解答做铺垫,我觉得C++解法思路就会清晰很多了。 解法1:暴力搜索 直接看代码: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 classSolution{public:vector<int>twoSum(vector<int>&nums,int target){//vector类型为长度可变的数组,更灵活。需要#include<vector>...
class Solution { public int[] twoSum(int[] nums, int target) { //遍历每个元素nums[i],查找是否存在值nums[j]相加后等于target。 for (int i = 0; i < nums.length; i++){ for(int j = i+1; j < nums.length;j++) { if (nums[i] + nums[j] == target) { return new int[]{...
classSolution{publicint[]twoSum(int[] nums,inttarget){if(nums ==null|| nums.length <=1) { System.out.println("input error, please check your input!");returnnewint[] {-1,-1}; } Map<Integer, Integer> map =newHashMap<Integer, Integer>();for(inti =0; i < nums.length; i++) ...
因此我们可以用两个for循环遍历整个数组,找到这个数组中两个值的和等于这个给定值的数组下标并输出。 回到顶部 三、Go代码 //1_常规解法func twoSum(nums []int, targetint) []int{varresult = [2]int{0,0}iflen(nums) <2{returnnil }fori :=0; i < len(nums) -1; i++{forj := i +1; j...
leetcode-solution C++【1】---two sum emm,leetcode 第一道原题网址https://leetcode.com/problems/two-sum/description/ 第一题题目简单,这里就不翻译啦 解题方案一,这里的时间复杂度为O(n^2) 属于brute force型 这里vector类称作向量类,它实现了动态数组,用于元素数量变化的对象数组。像数组一样,vector...
LeetCode刷题笔记0001 Two Sum 题目: Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, a...leetcode刷题之路1 Two Sum 给定一个整数数组 nums 和一个目标值 target,请你...