#include <bits/stdc++.h>
using namespace std;
int n,a[105],maxn;
int main(){
	freopen("high.in","r",stdin);
	freopen("high.out","w",stdout);
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		maxn=(maxn,a[i]);
	}
	cout<<maxn;
	return 0;
}