class Solution {
public:
    vector<int> twoSum(vector<int>& nums, int target) {

        vector<int> res;
        if (nums.size() == 0) return res;
        for (int i =0;i<nums.size()-1;i++){
            int num1 = nums[i];
            for (int j = i+1;j<nums.size();j++){
                int num2 = nums[j];
                if (num1+num2 == target){
                    res.push_back(i);
                    res.push_back(j);
                    return res;
                }
            }

        }
        return res;
    }
};