leetcode第一题(TWO SUM)

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].

class Solution {

public:
    vector<int> twoSum(vector<int>& nums, int target) {
        vector<int> result;
        for(int i=0;i<nums.size();++i)
        {
            for(int j=i+1;j<nums.size();++j)
            {
                if(nums[i]+nums[j]==target)
                {
                    result.push_back(i);
                    result.push_back(j);
                    return result;
                }
                
            }
            
        }
        
        return result;
    }
    
};