#include <bits/stdc++.h>
using namespace std;

int main(){
	
	int n;
	cin >> n;
        //Here we are getting size of the array

	int mx = 0;
        //Defining variable that we will store value of the maximum element

	vector<int> arr(n);
	for(int i = 0;i < n;i++)
		cin >> arr[i]; // Getting elements of the array

	for(int i = 0;i < n;i++)
		mx = max(mx, arr[i]); // We are comparing the elements of the array with the variable x and
                                      // writing the big one inside the variable.

	cout << mx << "\n";
        // Printing the answer

	return 0;
}