#include <bits/stdc++.h>
using namespace std;
int n;
struct Segment {
  int st, dr, pos;
} segments[300010];
int final_array[101];
int vis[10000000];
void afisare() {
  for (int i = 0; i < n; ++i) {
    cout << final_array[i] << " ";
  }
}
void bk(int k) {
  for (int i = segments[k].st; i <= segments[k].dr; ++i) {
    if (vis[i] == 0) {
      vis[i] = 1;
      final_array[segments[k].pos] = i;
      if (k == n - 1) {
        afisare();
        exit(EXIT_SUCCESS);
      } else
        bk(k + 1);
      vis[i] = 0;
    }
  }
}
bool cmp_segments(Segment s1, Segment s2) {
  return ((s1.st < s2.st) ? true : false);
}
void check(int value) {
  int minim = 1e9;
  int poz = -1;
  for (int i = 0; i < n; ++i) {
    if (segments[i].st <= value && value <= segments[i].dr) {
      if (vis[segments[i].pos] == 0 && minim > segments[i].dr - value) {
        minim = segments[i].dr - value;
        poz = segments[i].pos;
      }
    }
  }
  if (poz != -1) {
    final_array[poz] = value;
    vis[poz] = 1;
  }
}
int main() {
  cin >> n;
  for (int i = 0; i < n; ++i) {
    cin >> segments[i].st >> segments[i].dr;
    segments[i].pos = i;
  }
  int l_max = segments[0].st;
  int r_max = segments[0].dr;
  for (int i = 1; i < n; ++i) {
    l_max = min(l_max, segments[i].st);
    r_max = max(r_max, segments[i].dr);
  }
  sort(segments, segments + n, cmp_segments);
  for (int i = l_max; i <= r_max; ++i) {
    check(i);
  }
  afisare();
  return 0;
}
