#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
using ll=long long;
using ld=double;
ld pie=3.14159265359;
ll mod=998244353;
long long inf=100000000000000001;
int main(){
    ll n;
    cin >> n;
    vector<ll>a(n);
    for (ll i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    ll dai=a[0];
    ll ans=0;
    for (ll i = 1; i < n; i++)
    {
        if (dai>a[i])
        {
            ans=max(ans,a[i]);
        }
        dai=max(dai,a[i]);
    }
    cout << ans << endl;
}