#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
    {
        newNode->prev=tail;
        tail->next=newNode;
         tail= newNode;
    }
}
void display()
{
    if(head==NULL)
    {
        printf("Invalid input");
        return 0;
    }
    else
    {
        int min=head->data;
        Node*i=head->next
        while(i!=NULL)
        {
            if(i->data<min)
            min=i->data;
            i=i->next;
        }
        printf("%d",min);
    }
}
int main()
{
    int n,i,num;
    scanf("%d",&n);
    if(n<0)
    {
        printf("Invalid input");
        return 0;
    }
    for(i=1;i<=n;i++)
    {
        scanf("%d",num);
        create(num);
    }
    display();
}