#include<iostream>
#include<algorithm>
#include<map>
using namespace std;
class Solution {
public:
vector<int> twoSum(vector<int>& nums, int target) {
map<int,vector<int> > mp;
for(int i=0;i<nums.size();++i) mp[nums[i]].push_back(i);
sort(nums.begin(),nums.end());
vector<int> res;
for(int i=0;i<nums.size();++i)
{
for(int j=i+1;j<nums.size();++j)
{
if(nums[i]+nums[j]==target){
res.push_back(i);
res.push_back(j);
if((j-i)==1&&mp[nums[i]].size()>1)
{
res[0] = mp[nums[i]][0];
res[1] = mp[nums[i]][1];
}
else {
res[0] = mp[nums[i]][0];
res[1] = mp[nums[j]][0];
}
return res;
}
else if(nums[i]+nums[j]>target)break;
}
}
return res;
}
};
int main()
{
Solution s;
int a[]={0,2,0};
vector<int> v(a,a+sizeof(a)/sizeof(int));
vector<int> res=s.twoSum(v,0);
for(int &i:res)cout<<i<<endl;
}