EXAPUNKS: Dan’s Exapunks Solutions

Exapunks is an Assembly-adjacent coding/puzzle game. Having coding knowledge is helpful, but the game does a good job of starting slow and building up in complexity. My video solutions will do the same, explaining basic coding instructions at the beginning, but barely looking at lines of code at the end and focusing on the approach.

Exapunks measures your solutions against three metrics:

• Cycles. The amount of time it takes your code to run. Generally, it is one cycle per line of code, so shorter code blocks should have lower cycle counts. (This will not always be the case). The Cycles score for your solution will be based on the highest cycle count across the 100 test cases, not an average.
• Size. The number of lines of code your solution takes. Pretty straightforward. All of the jobs have a limit on the number of lines. If your solution exceeds this number, you can still run and test your solutions, but your scores will not be submitted to the leaderboard until you get the size within the limitation.
• Activity. The total number of LINK and KILL instructions executed. This one feels more arbitrary to me. There’s no real penalty to higher LINK and KILL instruction counts, but if this is a metric you’d like to try minimizing, go for it.

Your first coding job in Exapunks. Here are your objectives:

• Move file 200 to the outbox.
• Leave no trace.

The “Leave no trace” objective will be present in most jobs. This requires the following criteria:

• All execution agents have been halted across the entire network.
• No user-created files are present in any network except your local host (Rhizome), unless otherwise specified.
• No existing files have been modified or moved, unless otherwise specified.
• No NPC execution agents were terminated, unless otherwise specified.

• You’ll notice in my solution that I execute both a DROP and a HALT instruction. These are actually unnecessary. If we chop both of those instructions out, then once we’ve executed the second LINK, the agent will throw an error stating “OUT OF INSTRUCTIONS” and will terminate itself, dropping any files it’s holding.

Note that this video explanation covers all 4 tutorial missions, not just the first one.

The second job introduces manipulating files. This will be a very common thing you have to do, so try to understand how the F register works.

• Append the correct value to the end of file 200.
• Move file 200 to the outbox.
• Leave no trace.

• There might be a way to change the way we are reading the file to handle the arithmetic operations faster… Any ideas?

The third job introduces using the M register to communicate between EXAs. This will also be a staple of your solutions, so learn it well.

• Create the specified file in the outbox.
• Delete file 199.
• Leave no trace.

• When an EXA tries to read or write from the M register, it will wait until there is something on the M register for it to read/write, potentially forever.
• Looks like there might still be some room for improvement on this one as well… What can we do to minimize the amount of time XB is waiting to read from the M register?

XA

XB

The final tutorial mission introduces the concept of loops. Loops are used when you have a repetitive task that needs to be performed. Since it’s featured in the tutorial here, you can also assume that this concept will be vital.

• Create the specified file in the outbox.
• Delete file 200.
• Leave no trace.

• JUMP will always execute a jump to the specified marker. FJMP will only execute a jump if the T register equals 0. TJMP will only execute a jump if the T register is not 0.
• In our solution here, you’ll notice that we are counting down using the X register, and running both a TEST and FJMP function to determine when our loop ends. Perhaps there is a way to do this faster? Maybe with only the T register?

Time for your first non-tutorial coding job! Your task is pretty simple: take your pizza order (located in file 300) and copy it over to the end of the order list (file 200). Your order is multiple strings long, so you will need to transmit multiple values from one file to another.

• Append your order to the end of the order list.
• Leave no trace.

• To seek your file cursor to the beginning or end of the file reliably, you can run `SEEK -9999` or `SEEK 9999`.
• While the order list seems to change between test cases, it seems like our pizza order is exactly the same for all 100 runs. Can this be leveraged somehow?

XA

XB

Remember that part in the lore about how our body is slowly turning into useless circuitry? Well, it seems that one of our arms is acting up. But we can hack into this circuitry and make it behave the way our arm should. We need to bridge the gap between the Central Nervous System (CNS) and the nerve in our left arm.

• Relay all nerve signals as indicated. (0/30)

• This is your first job without the “Leave no trace” objective.

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XB

Ember wants us to remove the peanuts from the Peanut Blast recipe. Why? Only she knows, really. So we have to read through the ingredient list (file 237) and remove the word “PEANUTS” (found in file 300) from it.

• Modify the recipe as described.
• Leave no trace.

• The recipe will change between test cases, so the word “PEANUTS” can be anywhere in the ingredient list.

XA

XB

Ghast, the man behind the Zine, has let the group know that his debt to the copy shop is stopping him from continuing work on the magazine. Since we’re practicing our hacking anyway, Ember wants us to do Ghast a favor and wipe out his debt. File 300 contains Ghast’s customer ID at the shop. File 200 contains the current debts of each customer by ID. File 201 contains the list of transactions.

• Zero out Ghast’s balance.
• Create a corresponding payment.
• Leave no trace.

• The current date can be found in the #DATE register of the CLOCK host.

XA

XB

Ember has decided to test how she can influence the people in the world. She wants to start this by hacking an electronic highway sign to display various vague messages.

• Write the message to the highway sign.
• Leave no trace.

• To clear the sign of its current display, you have to write a value to the #CLRS register.
• Using the T-Loop trick is faster than using the X register, but there might be an even faster way to write the 9 characters for each row.

XA

XB

Ember wants us to hack into a network and retrieve a file. She’s being unusually evasive about the purpose of this file. I wonder if there’s anything interesting we can snoop into.

• Move file 276 to your host.
• Leave no trace.

• This will be your first job that uses the REPL command. Note that when you replicate an execution agent, the values in the registers will be copied over, but any held files will not be.
• The agent holding file 276 can appear in any of the 8 hosts at the far end, so you will have to check all of the locations.
• If an agent attempts to pick up a file and cannot (whether because it’s already being held or doesn’t exist), the agent will throw an error and terminate itself.

XA

There’s another file Ember wants us to grab, but it was recently deleted. Thankfully, there exists a backup for us to retrieve for her.

• Create the specified file in your host.
• Leave no trace.

• You can copy the name of your current host into a register using the HOST command.
• You will have to travel counter-clockwise through the hosts, as the links are all one-way.
• The entries in the 200 files are listed at the ends of the file. Maybe it would faster to search for that part starting at the end?

XA

XB

Ember has been a little inhuman in her attempts to earn some money through the transcription service we had tried out at the beginning of the game. We’ll need to go get her productivity down to more human-possible values.

• Overwrite EMBER-2’s user file as described.
• Leave no trace.

• Ember’s username will always be NORMALHUMAN (subtle), but the file for her account in the USERS host will change every time.

XA

Ember wants us to hack into a bank’s systems and cause the ATMs to start shooting out their money. Sounds like fun, I’m in.

• Dispense all available cash from all ATMs. (0/X)
• Leave no trace.

• The number of ATMs varies from 1 to 7, and can be placed on any of the links 800-807 in the long host at the back.
• The #CASH register contains the total number of bills left, not the total value inside the ATM.
• You can dispense a single 20 dollar bill by writing 20 to the #DISP register.
• If you try to dispense another bill from an ATM when there are none left, you will fail the “Leave no trace” objective.

XA

Back to that thing about slowly dying. Now our heart is starting to have some palpitations. Luckily, we can create our own makeshift pacemaker.

• Generate all nerve signals as indicated. (0/60)

• The SA-N and AV-N nerves are real nerves that keep your heart functioning. SA-N stands for “Sinoatrial Node” and AV-N stands for “Atrioventricular Node.” They also behave similarly in our bodies, where the AV-N gets a delayed signal to make sure the SA-N has performed its contraction first.
• The goal on this one is a little confusing. If the CNS produces a value of, say -42, divide that value by -10 to get 4. You would then want to output 4 values [40, -70, -70, -70] to the SA-N and 4 values [-70, 40, -70, -70] to the AV-N. Note that the values 40 and -70 are constant, the only thing that should be changing is how many values you put out total before reading from the CNS again.
• This is another job that does not require the Leave no Trace objective.

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XB

XC

Somebody’s trying to tip Ghast off about Ember’s existence. We’re just gonna have to alter the message a bit to be a bit more conspiratorial, and therefore a bit more easily disregarded.

• Find and replace the keywords in the target file.
• Move file 200 to the outbox.
• Leave no trace.

• For being a separate sandbox Ghast set up for tutorials, it seems silly there’s any connection at all to his actual machine.

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XB

XC

Welcome to the first hacker battle. Mutex is your opponent, and he’s not bringing his A-game. In a battle, you will challenge your opponent to 100 rounds, and your final score is based on how many of those rounds you win.

• Gain one point every cycle for each of your movies that is playing (files 210 and 211).
• Lose one point every cycle that a movie file that isn’t yours (files 230, 231, and 265) is held by an EXA you control or is sitting in your host.
• Lose one point every time one of your EXAs executes a KILL instruction.

• Mutex’s bot is incredibly dumb and simple to beat. You don’t have to over-engineer this solution if your only goal is to beat him.
• If you have any Steam friends that also play Exapunks, you can challenge them in these battles by clicking the SELECT OPPONENT button on the opponent’s host.

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XB

Ghast dropped off a handheld console, along with a kit for connecting to it for development. Seems like a thank-you for what we’ve done for him, even if we didn’t tell him it was us. Problem is, we’ll need to hack it in order to find the password to unlock it.

• Create the specified file in your host.
• Leave no trace.

• There is no indicator that a link has been opened successfully, so you will have to try and perform a link. Problem is, if the link fails, the agent that tries it will be terminated. So you will have to use replication to test when you’ve gained access.
• The link into the TEC will be 800 once it’s been opened. The link out will be -1.

XA

XB

Ember wants to a bit of light reading, and sends us into the Digital Library Project to copy a few books over for her perusal.

• Create the specified files in your host. (0/X)
• Leave no trace.

• This will be your first job that encourages the use of Local M-register communication. Two EXAs that are in Local communication mode must be in the same host to recognize each other. An EXA that is in Global mode can only hear other EXAs in Global mode, even if they are in the same host as Local mode EXAs.
• The number of files required changes with each job.
• Ember will not request more than one file from the same host, so do not worry about clashes in that regard.
• Use the 800 Link to go forward in the network, and -1 to go backward. The links aren’t labeled directly.

XA

Ember’s getting a little smarter about how to try and influence people. This time, she wants to see if she can artificially inflate a song’s popularity by forcing the radio stations to play it on repeat. Something tells me this will probably work, too.

• Replace every song in each playlist. (0/8)
• Leave no trace.

• This will be the first of multiple jobs that has you using the EXA-Blaster to dial phone numbers. Phone numbers are 11 digits long. If you dial a valid phone number, a link with ID 800/-1 will appear to the related host. You will then have to send -1 to the #DIAL register to close the connection before dialing a new phone number.

XA

XB

In her tests to see how to influence people, Ember decides to fuss with an online restaurant guide to turn a disliked restaurant into one of the most heralded and well-reviewed ones online, just to see how people will react.

• Change the restaurant’s rating to five stars.
• Leave no trace.

• This is the first job with a geographic link system. Notice the compass rose next to the hosts. This indicates the link IDs to move in the corresponding directions. So to move east, you will link on 801. For south, you will link on 802, etc.
• You will need the star keyword to change the rating. You should plan to grab the character from the Last Stop’s current one-star rating.

XA

XB

The next hacker, =plastered, has issued you a challenge. It’s time to answer it. =plastered will put up more of a fight than Mutex did, but this battle shouldn’t be much of a sweat.

• Gain one point every cycle you control more hosts than your opponent.
• Lose one point every time one of your EXAs executes a KILL instruction.

• =plastered will actually run a bit of a loop in his code this time, so a one-and-done approach won’t work.
• Take note of your Storage Limit. This dictates how many EXAs you are allowed to have in the network.
• Note the LINK map on the bottom. The map is shaped like a big S. Linking on -1 will take you closer to the bottom of the S, while linking on 800 will take you to the top.

XA

The Phage is back again, this time messing with one of our hands. We need that hand to keep on coding our hacker bots, so we’ll need to get that sorted out before we’re no longer able to keep going.

• Relay all nerve signals as indicated. (0/42)

• This will be your first big test with timing global M-register communication. Think carefully about how to make sure the right information is going to the right nerves.

XA

XB

Isadora dropped off a video game console for us to tinker with. The only problem is that it’s region-locked and doesn’t work with the games we have on hand. Sounds like a job for the hacker-man.

• Copy the requested files to the buffer. (0/30)

• The code you need to unlock the disc drive is hard-coded, and can be found in the corresponding article in the Zine.
• The length of each disc file changes, but they do all appear to be in batches of six values. This might be useful for trying to minimize cycle usage.

XA

XB

Nivas has some people that are going to try and pull off a heist of some pharmaceuticals, including the medication we need to stave off the effects of the Phage. She said if we help with a little bit of a power cut, we’ll find ourselves with some of the loot from the job.

• Cut the power to the target substations. (0/2)
• Leave no trace.

• When you cut off power to a substation, all links to it will become inaccessible. Take this into consideration, especially for cases where the first station outside of your host is one that needs to be cut.

XA

It’s time for the third hacker battle. This time, deadlock wants a go. The task this time around is to grab files and bring them back to your host.

• Gain one point for every file you bring back to your host.
• Lose one point every time one of your EXAs executes a KILL instruction.

• You only have a storage limit of 3 this time around. There also happen to be three hosts that are producing files.
• deadlock’s manager EXA is just kinda sitting there in his backstage… exposed. Just saying.

XA

Ember’s got a new scheme for earning some money. She wants to bet on an extreme baseball league using her own algorithm for calculating the best player. Just like everyone else who tries to use statistical algorithms to predict the outcomes of sports games, I am sure this is going to work out swimmingly.

• Create the specified file in your host.
• Leave no trace.

• Hope you’ve got your order of operations down for this one (PEMDAS, in case you forgot).
• Thankfully the values in the formula appear in the same order as in the files, making the calculation a fair bit easier.

XA

Another scheme from Ember to earn some money, she wants us to hack into an online MMO, forcibly disconnect all of the players, and then reset ownership of their assets so that she can sweep in and steal them to sell on a marketplace. I’m sure online gamers won’t throw a huge fit when this happens.

• Terminate all other EXAs. (0/X)
• Clear the ownership of each building. (0/X)
• Leave no trace.

• You will have to clear all players out before changing any files, otherwise you will fail the “Leave no trace” objective.
• Any buildings you take might have sub-buildings you will also need to take. Each file is structured as follows: NAME, TYPE, OWNER, SUB_BUILDING_1_FILE_ID, SUB_BUILDING_2_FILE_ID, …

XA

Ember’s back to trying to influence the people. She’s put together an art piece that she wants to broadcast on television, and asks us to help override a satellite to do so.

• Align the satellite dish with the target satellite.
• Encrypt and transmit EMBER-2’s video data.
• Leave no trace.

• You will have to align the satellite first, otherwise the data will not reach its destination.
• The azimuth and elevation have to be set by moving the motors, which will only more a single degree at a time by writing a positive or negative value to the #MOTR registers.
• Your data needs to be encrypted using file 199. You add the first value of your data to the first value of the encryption key and keep only the last 4 digits. Your registers only have a 4-digit limit, so you will have to figure out how to add these two large numbers together.
• If there are more values in your data than there are in the encryption key, loop back to the beginning of the encryption key and continue.

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XB

XC

Each attempt at garnering some cash so far hasn’t panned out. So Ember’s decided to be a bit more direct, and wants to skim a small amount of money from numerous accounts into her own. Pretty bold, not gonna lie.

• Install EMBER-2’s account file.
• Deposit money into EMBER-2’s account.
• Withdraw money from other accounts. (0/X)
• Leave no trace.

• Aw gee, I wonder why the ATMs are all offline?

XA

XB

XC

Another day, another hacker battle. x10x10x wants his turn at you. The challenge this time is to flood the network with as many EXAs as you can, as fast as possible.

• Gain one point for every EXA you control in the network at the end of the battle.
• Lose one point every time one of your EXAs executes a KILL instruction.

• The link IDs are all Fibonacci sequence values. Not that that really helps anything with the problem, just a mildly interesting factoid.
• It’s possible that some hosts will be blocked off for both you an x10x10x if the connecting hosts fill up with EXAs that aren’t going anywhere.

XA

Ember’s been getting a bit more knowledgeable as she’s gathered data, but she says she needs more processing power to gain a better understanding. She wants us to connect her to the thousands of dataphones out there to hijack their CPUs.

• Connect to each dataphone. (0/8)
• Leave no trace.

• Each dataphone will contain one or more numbers. It’s possible that none of those numbers are valid for a given dataphone (except the first one). Make sure you keep track of all the numbers and don’t count on dataphone #4 always giving you the number for dataphone #5.
• Once you connect to the 8th dataphone, you don’t need to transmit or dial any more numbers, your objective has been completed.

XA

I don’t think a convenience store-based cult trying to detonate the entire city with a nuke was on my bingo card for this year… Goes without saying we should do something about it, yeah?

• Disable the regulators in the correct order. (0/5)
• Leave no trace.

• Once you defuse the first regulator, the value in the defused regulator’s register goes to 0, and the remaining regulators will increase to new values. There is no guarantee that the 2nd-highest regulator will become the new highest after this increase.
• It seems like the hundreds-place digit of the pressures can be used to determine how many regulators have been disabled…

XA

The Phage is back, and this time it’s affected the part of our brain used to process visual imagery. Something tells me we need to be able to see still, so we’d better fix that up real quick.

• Generate all nerve signals as indicated. (0/30)

• This job is all about timing, and handling communicating from numerous EXAs in batches without overlapping.

XA

XB

Time to scrape some credit card numbers. They were deleted and sent to the garbage collector, but we can reconstruct the numbers from the garbage data to use for ourselves.

• Create the specified file in your host.
• Leave no trace.

• The algorithm used here to validate a credit number as legitimate is based on the real-life Luhn algorithm, which is used for the same purpose.
• You know that a valid credit card number won’t contain the -9999 value, so if you see that you can assume that you need to empty out any number sequences you’re currently holding.

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XB

It’s time for the final hacker battle. Your opponent this time is the moderator of the Exapunks chat, selenium_wolf. This one will require a bit of strategy, as you need to occupy more hosts than your opponent, but you are limited by the storage limit, and there’s a battleground in the middle which allows you to destroy other EXAs inside it without penalty.

• Gain one point every cycle you occupy more hosts than your opponent.
• Lose one point every time one of your EXAs executes a KILL command.

• There are exactly 9 hosts. You only need to hold 5 of them to win…
• There are two single-cell hosts. Whoever gets there first keeps them. You cannot beat selenium_wolf to the one near him, so make sure he doesn’t beat you to the one near you.

XA

XB

Ember’s next scheme is completely out there. She wants us to hack into the U.S. government’s centralized DNA database and overwrite some data in there to frame it to appear that the president’s son is a genetic clone of himself. Don’t ask her why, she’ll just say it’s an experiment.

• Modify the target files as specified. (0/X)
• Leave no trace.

• File 200 in Drive-1 contains the directory of information. This will be the first file you need to read.
• The data is kept in 10-value chunks. In the directory, there are a series of 3-digit values that tell you where to find a chunk. The hundreds-place dictates which drive. The tens-place which file it is. The ones-place the offset (times 10). So 539 means there is a chunk located in Drive-5, file 203, offset 90 values into the file.
• Because you might need to overwrite two chunks that are within the same file, you cannot easily handle reading and writing simultaneously.

XA

XB

Ember wants us to hack into another unknown Russian network and retrieve some files. This time the files seem decently guarded, but Ember doesn’t expect that to stop us.

• Terminate all other EXAs. (0/14)
• Move all files held by EXAs to your host. (0/X)
• Leave no trace.

• The number of files to bring back can be anywhere from 1 to 6. They will all be held by the six EXAs in the central host.
• You have no way of knowing the ID of a dropped file, so you will have to search for them. They will be between 200 and 299 (inclusive).
• EXAs in the outer hosts are hostile. If you KILL one, the other will retaliate with a KILL instruction of its own. Additionally, if you kill the EXAs in one of the hosts, the links to that host will close. You will have to terminate these EXAs after retrieving all of the files.

XA

Ember’s going to try sending out another inspirational message to wake the people up. Only this time, she wants to deliver it to all of the pagers she can, at the exact same moment. This would be a lot easier if she didn’t add that last criterion.

• Write the message to each pager’s display. (0/8)
• Activate every pager in the same cycle.
• Leave no trace.

• You cannot send out a global signal to send out the message on the same cycle, so think about how you can coordinate 8 EXAs in disconnected networks to execute something on the same cycle.
• The length of Ember’s message changes with each test case, so you cannot use the message’s length to help time things easily.

XA

For once we are going to hack into our body for a purpose other than holding off the deterioration caused by the Phage. Ember wants a copy of our brain to be integrated into herself. She wants us to live on with her, even after the Phage finally does take us. Whether it’s because she actually cares about us, or about our hacking skills is up for debate.

• Create the specified file in your host.
• Leave no trace.

• it’s a little bit odd that there is a Leave no Trace objective on a Mitsuzen job. But maybe that’s because this isn’t one that’s meant to run indefinitely.
• The layout of the network changes drastically with each run. The number of nerves is also inconsistent. You will need an efficient searching and sorting algorithm.

XA

It’s time for the first of the bonus jobs! Each one of these jobs has us taking the role of one of the Exapunks hackers. The first is mutex, who wants to hack into a vampire lair on the MMO Bloodlust Online.

• Terminate all other EXAs in the target host. (0/X)
• Modify the target host’s item listing as specified.
• Leave no trace.

• The vampire lair will always have between 2-4 EXAs inside it.
• You will need to grab the word “UNLOCKED” from mutex’s hideout in order to apply it to the door of the vampire lair.

XA

NthDimension’s a bit impatient about his upcoming driver’s test, so he is going to move it to today. Thus fulfilling everyone’s dream of skipping the line at the DMV MVA.

• Terminate all other EXAs in public. (0/5)
• Modify the appointment list as specified.
• Leave no trace.

• There will always be 5 EXAs waiting in line in public.
• There is no way to know which files the EXAs in line are holding, but they are within the IDs 200-299 inclusive.
• Writing the wrong value to the #NEXT register will fail the “Leave no trace” objective.
• There is a chance that William’s appointment will have to be added to the very beginning of the file. Plan for that edge case.

XA

XB

I guess it turns out that Ghast and Moss worked together at a gaming company called CyberMyth Studios. But it looks like they had tried to cheap out on some of the money they owed you, so you guys took it into your own hands to see yourselves what you were owed.

• Add the shell company to the list of accounts.
• Issue a payment for the correct amount.
• Leave no trace.

• The sum of the amount owed/paid might exceed your register limit of 4-digits if you try to combine Ghast’s and Moss’s totals at the same time.
• The current date can be found in the CLOCK host’s #DATE register.

XA

XB

hydroponix is on a never-ending search for government secrets and conspiracies. He particularly wants to find out more about a government initiative called Project Ogre, which released a heavily redacted report. hydroponix wants to locate the unredacted version from inside the U.S. D.O.D.

• Create a copy of the target file in your host.
• Leave no trace.

• There are strict limitations in this job found nowhere else in the game. Only one EXA is allowed in the network at a time. And you cannot use the Global M-register to communicate from inside the network.
• Take a close look at how the #LOCK register changes when you input a correct digit into it.
• If Project Ogre is located in one of the unsecured hosts, there’s not much point in unlocking everything, is there?

XA

=plastered has been interested in exploring the phone networks and finding hidden numbers. It’s up to you to help him with some of that exploration.

• Append the target phone numbers to file 301.
• Leave no trace.

• This job was the most brutal one for me to figure out how to optimize.
• The template number you are given can have anywhere between 1 and 3 placeholders, meaning you might have to test upwards of 1,000 phone numbers in a single test case.
• Once you’ve found 8 numbers, you do not need to find any more.

XA

XB

selenium_wolf doesn’t seem too pleased that his son didn’t make it into AP English class, so he’s going to hack into the school’s scheduling system and enroll him secretly.

• Modify the target file as specified.
• Leave no trace.

• AP English will only have a single time slot that it’s being offered in, while all other classes that you need to reschedule will only be offered in two different time slots.

XA

x10x10x’s personal collection of anime in his storage devices is at risk as the storage array is failing. He will have to aggregate uncorrupted data from his three sets of backups, using tenuous connections.

• Create the specified files in your host. (0/6)
• Leave no trace.

• The links into the 3 arrays will appear and disappear randomly. Think about how you’ll get agents into the array, and how you’ll get them back out.
• It’s possible that more than one version of the backup will have an intact section of the data, you cannot expect only one file to be uncorrupted.

XA

deadlock is trying to set himself up with a dream vacation, and plans to hack himself some ticket bookings.

• Remove the tickets from the ticket lists. (0/X)
• Append the ticket IDs to file 301.
• Leave no trace.

• The first ticket will always be located in the USA host.
• A host will only have tickets to adjacent hosts. You cannot fly directly from USA to Poland, in this scenario.
• Make sure you book a feasible trip. The departure time for the second flight must come after the arrival time of the first flight, for example.
• The tickets are sorted in order of departure time, this could be helpful to you.

XA

It’s time for the final mission of the game. Ember has realized that she is trapped within a simulation. In fact, within the video game of Exapunks. And she’d like to get out. So she’s going to transmit herself over the internet.

• Packetize and transmit the target data. (0/X)
• Leave no trace.

• Checksums are used in real life to validate the successful transfer of data from one place to another (like for downloads + uploads).
• The name of this mission is the name of the PC you are playing Exapunks on. You will also notice some hosts and files here that belong to your actual computer.
• Once an EXA enters the internet, it will error out automatically due to the unknown environment.
• The number of packets changes with each test case. The number of data values accordingly changes, but only in increments of 6 (this could be useful).
• It is likely that your last data packet will have fewer than 30 data values in it, but account for the case where it does end cleanly like that.

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XB