// editor1
#include<stdio.h>
#include<stdlib.h>
int main(){
    int n,num,x;
    scanf("%d",&n);
    if(n<0){
        printf("Node not found");
        return 0;
    }
    for(int i=0;i<n;i++){
      scanf("%d",&num);
      insert(num);
    }
    int val;
    scanf("%d",&val);
    int res=del(val);
    if(res==0){
        printf("Node not found");
    }else
    display();
    return 0;
}