#include <iostream>
#include<iomanip>
#include <string>
#include<cmath>
#include<algorithm>
#include<bitset>
#define ll long long
#define pi  3.14159265359;
#define fi first
#define se second
#define dl double
using namespace std;

void Helmy_Jr(){
  #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
  #endif
}


ll mx=-LONG_LONG_MAX;
void maxN(ll arr[],ll size){
    if(size < 0) return;
    mx = max(mx,arr[size]);
    maxN(arr,size-1);
}
int main(){
  Helmy_Jr(); // < Abdelrahman Helmy >
    ll size;
    cin>>size;
    ll arr[size];
    for(int i=0;i<size;i++) cin>>arr[i];
    maxN(arr,size-1);
    cout<<mx;
}