#include<stdio.h> 
#include<stdlib.h>

enum yn{yes,no};

struct cell{
int element;
struct cell *right;
struct cell *left;
};

enum yn member(int x,struct cell *p);
void insert(int x,struct cell **p);
int min(struct cell *p);

void main(int argc,char* argv[]){
	struct cell *init;
	enum yn a;
	int x;
	int b,c;
	init=NULL;
	scanf("%d",&b);
	for(int i=0;i<b;i++){
		scanf("%d",&c);
		insert(c,&init);
	}
	a=member(c,init);
	x=min(init);
	printf("%d",x);
}

enum yn member(int x,struct cell *p){
	struct cell *q;
	q=p;
	while(q!=NULL){
		if(q->element==x) return(yes);
		if(q->element<x) q=q->right;
		else q=q->left;
	}
	return(no);
}
void insert(int x,struct cell **p){
	struct cell *q,**r;
	r=p;
	q=*r;
	while(q!=NULL){
		if(q->element==x) return;
		if(q->element<x) {
			r=&(q->right);
			q=q->right;
		}
		else {
			r=&q->left;
			q=q->left;
		}
	}
	*r=(cell *)malloc(sizeof(cell));
	(*r)->element=x;
	(*r)->left=NULL;
	(*r)->right=NULL;
	return;
}

int min(struct cell *p){
	struct cell *q,*r;
	q=p;
	if(q==NULL){
		printf("aaa");
		exit(1);
	}
	while(q!=NULL){
		r=q;
		q=q->left;
	}
	return (r->element);
}