#include <bits/stdc++.h>
using namespace std;
struct triple {
  triple() {}
  triple(int i, int l, int r) : i(i), l(l), r(r) {}
  int i, l, r, val;
};
bool comp1(const triple& a, const triple& b) {
  if (a.l != b.l)
    return a.l < b.l;
  else
    return a.r - a.l + 1 < b.r - b.l + 1;
}
bool comp2(const triple& a, const triple& b) { return a.i < b.i; }
int n;
triple is[105];
int main(int argc, char const* argv[]) {
  cin >> n;
  for (int i = (0); i < (n); ++i) {
    int l, r;
    cin >> l >> r;
    is[i] = triple(i, l, r);
  }
  for (int ___ = (0); ___ < (n); ++___) {
    sort(is, is + n, comp1);
    is[0].val = is[0].l;
    for (int i = (1); i < (n); ++i)
      if (is[0].l != is[i].l)
        break;
      else
        ++(is[i].l);
    is[0].l = 100000000;
  }
  sort(is, is + n, comp2);
  for (int i = (0); i < (n); ++i)
    cout << is[i].val << ((i + 1 < n) ? " " : "\n");
  return 0;
}
