LeetCode--1.TwoSum
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LeetCode–1.TwoSum
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, and you may not use the same element twice.
Example:
Given nums = [2, 7, 11, 15], target = 9,Because nums[0] + nums[1] = 2 + 7 = 9,return [0, 1].
首先想到的直接两个循环不就完了,代码如下:
#include<iostream>#include<vector>using namespace std;class Solution{public: vector<int> twoSum(vector<int>& nums, int target) { vector<int> res; for (int i = 0; i < nums.size() - 1; ++i) { for (int j = i + 1; j < nums.size(); ++j) if (nums[i] + nums[j] == target) { res.push_back(i); res.push_back(j); break; } } return res; }};int main(){ vector<int> nums{ 2,7,11,15 }; int target = 9; Solution s; vector<int> res = s.twoSum(nums, target); system("pause"); return 0;}
结果提交了之后超时了=。=
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