import java.util.Scanner;
public class MaxInArray {

    public static int findMax(int[] arr, int index) {
        if (index==1) {
            return arr[0];
        }else
        return Math.max(arr[index-1],findMax(arr,index-1));
    }

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        if (!sc.hasNextInt()){
            System.out.println("Invalid input");
                sc.close();
                return;
        }else{
        int n=sc.nextInt();
        if(n<=0){
            System.out.println("Invalid input");
            sc.close();
            return; 
        }}
        int[] array =new int[n];
        for (int i=0;i<n;i++){
            array[i]=sc.nextInt();
           }
        
        int max = findMax(array, n);
        System.out.println(max);
    
            
        }
}