Wednesday, July 22

slammer

daily challenge12

today's brief

January 25, 2003. The SQL Slammer worm fits inside a single 376 byte packet, needs no disk, and just sprays copies of itself as fast as the wire allows. It doubles the count of infected machines about every 8.5 seconds and saturates most of the vulnerable internet in around ten minutes, taking out ATMs, airline check-in, even a nuclear plant's monitoring network. Replay the spread: print the count as it doubles, until it hits the ceiling of hosts left to infect.

Objective

Print the infected host count doubling each interval, from 1, capped at 75000.

Steps

One argument: the number of doubling intervals to simulate (a non-negative integer).
Start at 1 infected host and print it. For each interval, double the count and print it, one number per line.
The pool of vulnerable hosts is 75000: if doubling would pass it, print 75000 instead, and keep printing 75000 for any remaining intervals.
If the argument count is not exactly one, print wrong number of arguments followed by a newline.

examples

$ ./main 3

1 2 4 8

$ ./main 0

Constraints

Expected files

main.c

Allowed functions

printfatoi

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Solutions

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