#include<iostream>
using namespace std;
int maxim(int v[], int n) {
int maxx = v[1];
for (int i = 2; i <= n; i++)
if (v[i] > maxx)
maxx = v[i];
return maxx;
}
int main() {
int v[101], n;
cin >> n;
for (int i = 1; i <= n; i++)
cin >> v[i];
cout << maxim(v, n);
return 0;
}