#include <iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    int niza[n], i, s;

    for (i = 0; i < n; i++){
        cin >> niza[i];
    }

    s = niza[0];
    for (i = 1; i < n; i++){
        if (niza[i] > s){
            s = niza[i];
        }
    }

    cout << s << endl;

    return 0;
}