#include <bits/stdc++.h>
long a[200] = {0}, l[200] = {0}, r[200] = {0}, h[200] = {0},
     hash[10000005] = {0};
long found(long k) {
  h[k] = 1;
  for (long i = l[k]; i <= r[k]; i++)
    if (h[hash[i]] == 0) {
      if (hash[i] == 0 || found(hash[i])) {
        hash[i] = k;
        a[k] = i;
        return 1;
      }
    }
  return 0;
}
int main() {
  int n;
  scanf("%d", &n);
  for (long i = 1; i <= n; i++) {
    scanf("%ld%ld", &l[i], &r[i]);
    memset(h, 0, sizeof(h));
    found(i);
  }
  for (int i = 1; i <= n; i++) printf("%ld ", a[i]);
  return 0;
}
