#include <bits/stdc++.h>
using namespace std;
bool used[10000005];
int ans[105];
bool comp(pair<pair<int, int>, int> a, pair<pair<int, int>, int> b) {
  if (a.first.second == b.first.second) return a.first.first < b.first.first;
  return a.first.second < b.first.second;
}
void solve() {
  int N;
  cin >> N;
  vector<pair<pair<int, int>, int>> x(N);
  for (int i = 0; i < N; i++) {
    cin >> x[i].first.first >> x[i].first.second;
    x[i].second = i;
  }
  sort(x.begin(), x.end(), comp);
  for (int i = 0; i < N; i++) {
    for (int j = x[i].first.first; j < x[i].first.second + 1; j++) {
      if (!used[j]) {
        used[j] = true;
        ans[x[i].second] = j;
        break;
      }
    }
  }
  for (int i = 0; i < N; i++) {
    cout << ans[i] << " ";
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int t = 1;
  while (t--) {
    solve();
  }
  return 0;
}
