// editor1
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *next;
    struct node *prev;
}node;
node *head=NULL,*tail;
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 display(){
    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);
}
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;
    }
}