767 A. Snacktower.cpp

// problem link:http://codeforces.com/problemset/problem/767/A
//status:accepted
//author : mohand sakr
//notes : use this code under your responsiblity .



#include <iostream>
using namespace std;
bool arr[100001];
 int current=0;
void print(int x, int current2){
	
if(x==current2);
{
	// cout<<current2<<" *"<<endl;
	for(	int i	=	current2 ;	i>0	;	i--	){
		if(arr[i]){
		cout<<i<<" "	;
			arr[i]=0	;
			current =i-1;
		}
		else {
			break;
		}
		
	}

	
}
	
}


int main() {
 int n;
 cin>>n;
current=n;
 for(int i=0;i<n;i++){
 	int x;
 	cin>>x;
 	arr[x]=1;
 	print(x,current);
   cout<<endl;
 	
 }
 
 
 
 
 
 	return 0;
}