#include<bits/stdc++.h> #define int long long using namespace std; inline int read(){ int x=0; bool f=1; char c=getchar(); while(c>'9'||c<'0'){if(c=='-')f=0;c=getchar();} while(c>='0'&&c<='9'){x=(x<<3)+(x<<1)+c-'0';c=getchar();} return f?x:-x; } int n,a[105]; signed main(){ n=read(); for(int i=1;i<=n;i++)a[i]=read(); if(n&1)cout<<max(a[1],a[n])<<endl; else cout<<min(a[1],a[n])<<endl; return 0; }