#include <bits/stdc++.h>

using namespace std;

int N;
pair<int, int> A[1000];

int main()
{
    scanf("%d", &N);
    int a, b;
    for(int i=0; i<N; i++)
    {
        scanf("%d%d", &a, &b);
        A[i]=make_pair(a+b, i+1);
    }
    sort(A, A+N);
    for(int i=0; i<N; i++)
        printf("%d ", A[i].second);
    printf("\n");
    return 0;
}

• Problem Description
  Jim’s Burgers has n hungry burger fans waiting in line. Each unique order, i,is placed by a customer at time ti, and the order takes di units of time to process.
  
  Given the information for all n orders, can you find and print the order in which all n customers will receive their burgers? If two or more orders are fulfilled at the exact same time t, sort them by ascending order number.
  
  Input Format
  
  The first line contains a single integer, n, denoting the number of orders.
  Each of the n subsequent lines contains two space-separated integers describing the respective values of ti and di for order i.
  
  Constraints
  1 <= n<= 10^3
  1 <= i<= n
  1 <= ti, di <=10^6
  Output Format
  
  Print a single line of n space-separated order numbers (recall that orders are numbered from 1 to n ) describing the sequence in which the customers receive their burgers. If two or more customers receive their burgers at the same time, print the smallest order number first.
• Test Case 1
  Input (stdin)3
  1 3
  2 3
  3 3
  Expected Output1 2 3
• Test Case 2
  Input (stdin)5
  8 1
  4 2
  5 6
  3 1
  4 3
  Expected Output4 2 5 1 3