e

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

int main() {
    int n, max=-10e6;
    cin >> n;
    vector <int> a(n);
    for (int i = 0; i<n; i++) {
        cin >> a[i];
    }
    sort(a.begin(), a.end());
    cout << a[n-1];
}