STACKEZ - Easy Stack

You have an empty stack and you are given some queries. These queries are the basic stack operations such as Push, Pop, and printing the Top element. Now, you should process the given queries.


First line contains an integer T (0 <= T <= 106).
Each of the next T lines contains a query based on these formats.
1 n : Push n (0 < n <= 109) to the top of the stack.
2 : Pop an element from the top of the stack. If the stack is empty, do nothing.
3 : Print the top element of the stack (see Output Format).


For each query 3, print the top element of the stack. If the stack is empty, print 'Empty!' without quotes.


1 15
1 20
3 Output: 15


Enormous input data!

hide comments
vancuonghg: 2020-09-15 06:11:22

Hello everyone

C++ time limit.
Could you give me any suggestion?

ashish_k: 2020-08-05 20:44:28

use fast I/O in C++ for getting AC....

aish12345: 2020-05-20 13:50:04

@unlock1997 maybe because you are not printing the outputs on a new line.

le_hue_369: 2020-05-20 02:37:06

it's passed when I code in C++ and I don't know why I receive "time limit exceeded" when I code in Java with the same code from the C++ one.

razor_tyr0x: 2019-03-14 15:28:52

And also for WA, don't forget to read the output correctly and checked it before and after empty

budds: 2018-09-01 07:10:08

for c++ ,
use long long int

rajeeb3610: 2018-07-24 05:11:20

I don't understand why I am getting Runtime error for this question.
While I am getting the correct output for this in my code editor.

Ishan: 2018-04-18 15:21:41

For people getting WA , don't assume line will start with 1, 2 or 3.
For line starting with anything else just ignore and continue to next line.

phanvanson: 2017-07-09 09:15:10

java time limit :(

pinni_157: 2017-05-31 10:21:37

please explain the problem clearly!

Added by:Lucas
Time limit:0.5s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)