#include <iostream>
#include <fstream>
using namespace std;
ifstream f("date.in");
int st[101],dr[101],i,j,n,v[101],c=1;
struct nod{
    int info;
    nod* st;
    nod* dr;
};
nod* v,z;
int main(){
    f>>n;
    for(i=1;i<=n;i++){
        f>>v[i];
    }
    for(i=1;i<=n;i++){
        st[i]=v[2*i];
        dr[i]=v[2*i+1];
        cout<<v[i]<<" "<<st[i]<<" "<<dr[i]<< " " ;
        cout<<endl;
    }
    for(i=1;i<=n;i++){
        if(st[i]>v[i] || (dr[i]<v[i] &&dr[i])){
            c=0;
            break;
        }
    }
    if(c) cout<<"Arborele este de cautare";
    else cout<<"Arborele nu este de cautare";
    return 0;
}