#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->next=NULL;
    newnode->prev=NULL;
    if(head==NULL){
        head=newnode;
        tail=newnode;
    }
    else{
        tail->next=newnode;
        newnode->prev=tail;
        tail=newnode;
    }
}
 void dis(){
     int max=head->data;
     node *temp=head;
     while(temp!=NULL){
         if(temp->data>max){
             max=temp->next;
         }
        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=1;i<=n;i++){
         scanf("%d",&num);
         create(num);
     }
     dis();
     return 0;
 }