ADAQUEUE - Ada and Queue


Ada the Ladybug has many things to do. She puts them into her queue. Anyway she is very indecisive, so sometime she uses the top, sometime the back and sometime she decides to reverses it.

Input

The first line consists of 1 ≤ Q ≤ 106, number of queries. Each of them contains one of following commands

back - Print number from back and then erase it

front - Print number from front and then erase it

reverse - Reverses all elements in queue

push_back N - Add element N to back

toFront N - Put element N to front

All numbers will be 0 ≤ N ≤ 100

Output

For each back/front query print appropriate number.

If you would get this type of query and the queue would be empty, print "No job for Ada?" instead.

Example Input

15
toFront 93
front
back
reverse
back
reverse
toFront 80
push_back 53
push_back 50
front
front
reverse
push_back 66
reverse
front

Example Output

93
No job for Ada?
No job for Ada?
80
53
66

hide comments
Nilutpal Borgohain: 2016-09-08 14:51:52

Why is my program giving run time error in spite of the fact that I have not used any loops ?

morass: 2016-09-06 11:53:21

@[Rampage] Blue.Mary Thank you man! Updated!

[Rampage] Blue.Mary: 2016-09-06 03:40:02

My AC program outputs "No job for Ada?" (according to the example output). The output specification should be updated.


Added by:Morass
Date:2016-09-06
Time limit:3.5s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ASM64 GOSU