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

typedef struct node{
    int data;
    struct node *right,*left;
}node;
node *root=NULL;

node* create(int num){
    node *newnode=(node*)malloc(1*sizeof(node));
    newnode->data=num;
    newnode->right=NULL;
    newnode->left=NULL;
    return newnode;
}

node* ins(node *root,int num){
    if(root==NULL){
        return create(num);
    }
    if(num<root->data){
        root->left=ins(root->left,num);
    }
    else if(num>root->data){
        root->right=ins(root->right,num);
    }
    return root;
}

node* min(node *root){
    if(root==NULL){
        return root;
    }
    if(root->left != NULL){
        return min(root->left);
    }
    return root;
}

int main(){
    int s,n,i;
    scanf("%d",&s);
    for(i=0;i<n;i++){
        if(!scanf("%d",&n)){
            printf("Invalid input");
            return 0;
        }
        
    }
    int *ans=min(root->data);
    printf("%d",ans);
    return 0;
}