#include <bits/stdc++.h>
using namespace std;
inline int64_t max(int64_t a, int64_t b) { return (a > b) ? a : b; }
inline int64_t min(int64_t a, int64_t b) { return (a < b) ? a : b; }
inline int64_t max3(int64_t a, int64_t b, int64_t c) {
  return max(a, max(b, c));
}
inline int64_t min3(int64_t a, int64_t b, int64_t c) {
  return min(a, min(b, c));
}
int64_t gcd(int64_t a, int64_t b) { return (a % b == 0) ? b : gcd(b, a % b); }
int64_t pow3(int64_t a, int64_t b, int64_t m = 1000000007) {
  int64_t res = 1;
  while (b > 0) {
    if (b & 1) res = (res * a) % m;
    a = (a * a) % m;
    b >>= 1;
  }
  return res;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int64_t t = 1;
  while (t--) {
    int n;
    cin >> n;
    pair<int, int> a[n];
    for (int i = 0; i < n; i++) cin >> a[i].first >> a[i].second;
    sort(a, a + n);
    int64_t ans[n];
    ans[0] = a[0].second;
    for (int i = 1; i < n; i++) {
      if (a[i].second >= ans[i - 1])
        ans[i] = a[i].second;
      else
        ans[i] = a[i].first;
    }
    cout << ans[n - 1];
  }
  return 0;
}
