#include <bits/stdc++.h> using namespace std; int main() { int n,a,b; scanf("%d",&n); for(int i=1,x;i<=n;i++) { scanf("%d",&x); if(i==1) a=x; if(i==n) b=x; } if(n%2) cout<<max(a,b)<<endl; else cout<<min(a,b)<<endl; return 0; }