Count_1__Baby

Count 1: Baby

Programming

Challenge

DESCRIPTION
My friend has said that my code is too long.
Can you make it shorter?

count1-baby.cddc19q.ctf.sg 11111

* gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04)
* This challenge is not a pwn challenge.

MD5("count1-baby.zip"): 3AC2805F91E3FDE946C3B5B6A497EFF2

ATTACHED FILES
count1-baby.zip

Solution

What we are given

We need to shorten a program which counts from 1 to 9999 inclusive.

$ nc count1-baby.cddc19q.ctf.sg 11111

[Count 1: Baby]

My friend has said that my code is too long.
Can you make it shorter?

This is my code:
----------------------------------------|
#include <stdio.h>

int main(int argc, char *argv[])
{
	int i;

	for( i = 1 ; i < 10000 ; i++ )
	{
		printf("%d,", i);
	}

	return 0;
}
----------------------------------------/
    
Your code : 

From the provided source code, it is wrapped around a python instance which checks for char length.

def check(code):
    if len(code) > 53:
        print "Code size is {}! Too long!".format(len(code))
        sys.exit(-1)
    elif len(code) < 20:
        print "Really? Are you kidding me?"
        sys.exit(-1)
    else:
        bad_func = ["system", "exec", "popen"]
        for b in bad_func:
            if b in code:
                print "Nope! Don't even attempt to pwn this challenge!"
                sys.exit(-1)
    for ch in code:
        if ch not in letters + digits + punctuation: # filter
            bye(ch)

Only allowed chars are letter, digit and punctuation.

Notice there are no whitespaces (we can replace spaces with /**/)

We are also limited to 52 chars length.

Solving it

Since we are limited at max 52 chars, this is a codegolf challenge.

If we go to stackoverflow, we see how other people gave tips on declaring variables

https://codegolf.stackexchange.com/a/2230

Abuse main's argument list to declare one or more integer variables:
main(a){for(;++a<28;)putchar(95+a);}

With this, we can modify it to get out answer at 44 chars

main(i){for(i=1;i<10000;i++)printf("%d,",i);}

Flag

Flag : $CDDC19${Count2_is_waiting_Please_enjoy!}