bool cmp(pair<int, int> a, pair<int, int> b)
 {
    if(a.first == b.first) return a.second < b.second;
    return a.first < b.first;
 }

vector<int> jimOrders(vector<vector<int>> orders) {
    vector<pair<int, int>> vp; 
		//first: serve time, second: *th-customer
    int n =  orders.size();
    for(int i = 0; i < n; i++){
        vp.push_back(make_pair(orders[i][0] + orders[i][1], i));
    }
    sort(vp.begin(), vp.end(), cmp);
    vector<int> ans;
    for(int i = 0; i < n; i++){
        ans.push_back(vp[i].second + 1);
    }
    return ans;
}