#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, k = 100000000, t;
  cin >> n;
  int a[n];
  for (int i = 0; i < n; i++) cin >> a[i];
  for (int i = 1; i < n; i++) {
    t = max(a[i - 1], a[i]);
    k = min(t, k);
  }
  cout << min(min(a[0], a[n - 1]), k);
  return 0;
}
