import java.util.Scanner;
public class Main {
public static void main(String[] args) {
int k = -2147483648;
Scanner in = new Scanner(System.in);
int n = in.nextInt();
int a[] = new int[n];
for (int i = 0;i < a.length;i++){
a[i] = in.nextInt();
}
for (int i = 0;i < a.length;i++){
if (a[i] > k){
k = a[i];
}
}
System.out.print(k);
}
}
Объяснение: