#include <iostream>
using namespace std;
int findMax(int arr[], int len) {
    int max_val = 0;
    for(int i = 0; i < len; i++) {
        if(arr[i] > max_val) {
            max_val = arr[i];
        }
    }
    return max_val;
}
int main() {
    int n;
    cin >> n;
    int *arr = new int[n];
    for(int i = 0; i < n; i++) {
        cin >> arr[i];
    }
    cout << findMax(arr, n) << endl;
    delete[] arr;
    return 0;
}