import java.util.*;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
while(sc.hasNext()){
int n = sc.nextInt();
int[] arr = new int[n];
for(int i = 0; i < n; i++){
arr[i] = sc.nextInt();
}
Arrays.sort(arr);
System.out.println(arr[n-1]);
}
}
} import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int people = scanner.nextInt();
List<Integer> list = new ArrayList<>(people);
for (int i = 0; i < people; i++) {
list.add(scanner.nextInt());
}
Integer integer = list.stream().max(Integer::compare).get();
System.out.println(integer);
}
}
import java.util.*;
public class Main
{
public static void main(String [] args)
{
Scanner sc=new Scanner(System.in);
while(sc.hasNextInt())
{
int n=sc.nextInt();
int [] arr=new int[n];
for(int i=0;i<n;i++)
{
arr[i]=sc.nextInt();
}
int max=arr[0];
for(int i=1;i<n;i++)
{
if(arr[i]>max)
{
max=arr[i];
}
}
System.out.println(max);
}
}
}