target-hvac

Your mission

Count the network rows a single vendor account reaches from end to end.

today's brief

November 2013. Attackers get into Target through Fazio Mechanical, the refrigeration contractor with a login for the vendor billing portal. From there the network was flat enough to walk, and card scraping software lands on the registers in time for Black Friday. Forty million cards go out the door. Map how far a single vendor account reaches.

See it in action

flat_rows({1,1,1,1,0,1,0,0,0}, 3, 3)

Expected result

Your checklist

For your own tracking. Tests grade your code.

net holds h rows of w segments, one row after the next.
A segment is 1 when the vendor account reaches it and 0 when it does not.
Return how many rows have every one of their segments reachable.
w is at least 1, and h can be 0.

More examples

flat_rows({1,1,1,1,0,1,1,1}, 2, 4)

Expected result

flat_rows({1,1,0,1}, 4, 1)

Expected result

Constraints

Expected files

zones.c

Allowed functions

None. Write every helper yourself.

Back to compete

Solutions

target-hvac

Your mission

Count the network rows a single vendor account reaches from end to end.

today's brief

See it in action

flat_rows({1,1,1,1,0,1,0,0,0}, 3, 3)

Expected result

Your checklist

For your own tracking. Tests grade your code.

net holds h rows of w segments, one row after the next.
A segment is 1 when the vendor account reaches it and 0 when it does not.
Return how many rows have every one of their segments reachable.
w is at least 1, and h can be 0.

More examples

flat_rows({1,1,1,1,0,1,1,1}, 2, 4)

Expected result

flat_rows({1,1,0,1}, 4, 1)

Expected result

Constraints

Expected files

zones.c

Allowed functions

None. Write every helper yourself.

Back to compete

Solutions