// editor3
#include<stdio.h>
#include<stdlib.h>

typedef struct Node{
    int data;
    struct Node *left, *right;
}Node;

Node *createNode(int data){
    Node *newNode=(Node*)malloc(sizeof(Node));
    newNode->data=data;
    newNode->left=newNode->right=NULL;
    return newNode;
}

Node *addNode(Node *node, int data){
    if(node==NULL)return createNode(data);
    if(data<node->data){
        node->left=addNode(node->left, data);
    }
    else{
        node->right=addNode(node->right, data);
    }
    return node;
}

int findMax(Node *node){
    while(node->right!=NULL){
        node=node->right;
    }
    if(node->left!=NULL)return node->left->data;
    else return node->data;
}

int main(){
    int size, data;
    Node *root=NULL;
    
    scanf("%d", &size);
    if(n<=0){
        printf("Invalid input");
        return 0;
    }
    for(int i=0;i<n;i++){
        scanf("%d", &data);
        addNode(root, data);
    }
    
    printf("%d", findMax(root));
    return 0;
}