001两数之和

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