=

#include <bits/stdc++.h>
using namespace std;
int main()
{
int tt, mx = 0;
cin >> tt;
while (tt--)
{
int n;
cin>>n;
mx = max(mx , n);
}
cout << mx;
}

#include <iostream>
using namespace std;
int main() {
int n; 
cin>>n;
int a[n]; 
for (int i=0;i<n;i++) {
cin>>a[i];
}
int max=a[0];
for (int i=1;i<n;i++) {
if (a[i]>max) {
max=a[i]; 
}
}
cout<<max<<endl;
return 0;
}