// editor2
#include<stdio.h>
#include<stdlib.h>
typedef struct node(){
    int data;
    struct node *next;
    struct node *prev;
}Node;
Node *head=NULL,*tail;
void create(int num){
    Node
    newnode=(Node)malloc(1*sizeof(Node));
    newnode->data=num;
    newnode->prev=NULL;
    newnode->next=NULL;
    if(head==NULL){
        head=newnode;
        tail=newnode;
    }
    else{
        newnode->next=tail->next;
        tail->next=newnode;
        tail=newnode;
    }
}
void dispaly(){
    if(!head){
        printf("List is empty");
        return;
    }
    int max=head->data;
    Node *temp=head->next;
    while(temp){
        if(temp->data>max)
        max=temp->data;
        temp=temp->next;
    }
    printf("%d",max);
}
int main(){
    int n,num;
    scanf("%d",&n);
    if(n<=0){
        printf("Invalid input");
        return 0;
    }
    for(int i=0;i<n;i++){
        scanf("%d",&num);
        create(num);
    }
    display();
    return 0;
}