So there cannot be any beacons WebFor more information about Rydberg Technologies, products and services, research and development thrusts, collaborations and partnerships, or any other inquiries please contact us via email at [emailprotected], by phone at (734) 330-2836, or using the contact form below. So, lets focus only on the valves that release pressure. Part 1: Let $s = (s_0, s_1)$ and $b = (b_0, b_1)$ be the coordinates of a given sensor and its closest beacon. All rights reserved 2023 Erlang Solutions Ltd. https://github.com/aleklisi/AdventOfCode2022, https://github.com/aleklisi/AdventOfCode2022/blob/main/day1_puzzle1/src/day1_puzzle1.erl#L48-L56, https://github.com/aleklisi/AdventOfCode2022/tree/main/day2_puzzle1, https://github.com/aleklisi/AdventOfCode2022/tree/main/day2_puzzle2, https://github.com/aleklisi/AdventOfCode2022/tree/main/day3_puzzle1, https://github.com/aleklisi/AdventOfCode2022/tree/main/day3_puzzle2, https://github.com/aleklisi/AdventOfCode2022/tree/main/day5_puzzle2, https://www.erlang.org/doc/man/digraph.html, https://github.com/aleklisi/AdventOfCode2022/tree/main/day10_puzzle, https://en.wikipedia.org/wiki/Diffie%E2%80%93Hellman_key_exchange, https://en.wikipedia.org/wiki/Cellular_automaton, https://en.wikipedia.org/wiki/Depth-first_search. Advent of Code is an annual event featuring Christmas-themed puzzles that are meant to be solved with code. Since 2015, tens of thousands of programmers have tackled the new puzzles that appear every day from December 1 through 25 at the stroke of midnight (U.S. Eastern standard time). Unfortunately, it turned out that it takes way too long to generate all of the permutations. Nor do you need a fancy computer; every problem has a solution that completes in at most 15 seconds on ten-year-old hardware. The same code should eventually return results. That is when an element is added to a set multiple times it is stored only once. Notice that the game score count does not change, so if we determine what we have played based on the new understanding of input and provide parsing output to follow the same rules as we did in todays puzzle 1 when doing the parsing, the rest of the code should work correctly without any change. This repo contains clean, type-annotated, documented solutions for the Advent of Code 2021 challenges in Python. WebAvant Solution; 22511 Telegraph Road; Southfield, MI 48033 (248) 423-2729 Visit Website Get Directions Similar Businesses. Find your place in tech on #TeamAmex. Keep track Lets now take a look at a pair of packets compared. To calculate that, subtract the free memory from how much memory needs to be freed. For the input, we are given a list of paired ranges. A I fixed one range (5 to 7) and placed the other range in different configurations, starting from both ends of the second range being smaller and ending on both ends of the second range being bigger (the only 2 cases when the two ranges do not overlap). take a list of valves, and the initial paths (that is a single path containing exactly one valve [AA] (our starting point)). Advent of Code is an annual event featuring Christmas-themed puzzles that are meant to be solved with code. WebFor more information about Rydberg Technologies, products and services, research and development thrusts, collaborations and partnerships, or any other inquiries please contact us via email at [emailprotected], by phone at (734) 330-2836, or using the contact form below. Day 2. Instead, Advent of Code is a great arena for learning new skills and testing out new features of Python. But there is a much more convenient way to do it: using tracing. Finding the shortest path from start point to destination is as easy as running this cypher query: Parametrised with coordinates of S and E points in the grid. First, find the shortest paths between all pairs of valves with non-zero flow (and the shortest path between the starting For part 1, use dictionaries to look up the score. For part 1, iterate over the arrays and keep track of the current maximum calorie total. For solving this puzzle it is very helpful to define a map (a data structure) of a monkey like this one: Storing a predicate in the `test` and `operation` fields for each monkey allows for certain convenience of later usage. WebOur sponsors help make Advent of Code possible: Accenture Federal Services - Technology & ingenuity moving missions forward come solve problems with us. Take a second to notice that the first range contains the second one when both of the following conditions are met: Also spot that the second range might be the one containing the first one, so we have to reverse the condition (that is the part after `orelse`). For part 1, iterate over the string, starting at position 4. In both puzzles, we are interested in counting the faces of the cubes. This is because each `addx` operation takes 2 cycles. There is only one square that the beacon cannot be in and there are no left steps to search left or right. In the first puzzle, we need to find signal strength (defined as the cycle number multiplied by the value of the X register) in the 20th, 60th, 100th, 140th, 180th, and 220th cycles. whether the length of the set is equal to 4. Since running the simulation for the first few hundred (~300) steps was instantaneous, I decided not to run the normalisation of items every single step. WebAdvent of Code y. The distance between the sensor and the row is 2. If you are interested in looking more into how I did that, take a look at the code here. The task requires us to divide the input into groups of 3 lines (Elves group), where each line represents the Elfs rucksack content. Folding does not work either (obviously I bet someone can make it work, but it is way too complicated to be interested in doing) as it always needs to process the whole list. The code applying this logic is somewhat complex. Eventually, they'll go away too, but not before 10 100000000000000000000000000 , and probably much later. Our ACA administration services provide the expertise to comply with ACA employer requirements including Employee notices, IRS Forms 1094-C & 1095-C, and variable hour tracking. achieve a more efficient $O(n^2)$ solution by using a lookup table to keep track of the last index each height was seen. WebOur sponsors help make Advent of Code possible: Accenture Federal Services - Technology & ingenuity moving missions forward come solve problems with us. Please So now we need to repeat the calculations from the first puzzle adding the simulation of expanding steam. For the second puzzle, we need to calculate only the walls facing outwards. This year, well be solving each of the problems in Erlang and publishing the results. However, since the set of possible heights is small (there are only 10), we can the union of all these ranges. Notice that if I have nodes in the database, I can delegate finding where I can take steps to the database. For part 2, build an array of all elves' calorie totals, then sort it and sum the last 3 values. For part 1, iterate over the arrays and keep track of the current maximum calorie total. https://github.com/aleklisi/AdventOfCode2022/tree/main/day17_puzzle1. To convert to SNAFU, iterate Complete code available here: https://github.com/aleklisi/AdventOfCode2022/tree/main/day5_puzzle1. As soon as the data is loaded into the database, finding the path in a graph should be blazing fast. https://github.com/aleklisi/AdventOfCode2022/tree/main/day11_puzzle2. This idea almost works, but it takes way too long to execute. This is a simple enough task. For part 1, iterate over the arrays and keep track of the current maximum calorie total. node humn to np.nan, and during the traversal find the path from root to humn. Todays puzzle is about processing a list of instructions for a simple processor with a single registry. remove the items as a block. by some factor. This simplifies the calculation of scores and strategies. For part 2, this code only works for my particular Are you sure you want to create this branch? of locations and cycle step. The programming puzzles cover a variety of skill sets and skill levels and can be solved using any programming language.Participants also compete based on speed on both global and private The second puzzle is about eliminating squares from a given area. The second puzzle is again about running simulation, but this time the stop condition is different and there is an infinite line of rocks at MaxY + 2 line. The only modification for this puzzle is how we move the crates. whenever (ind2 - 1) % 3 == ind1. I tried 2 approaches, which failed. Use the usual algorithm for converting bases to convert the decimal answer to base 5. Traverse the graph depth-first to find the total size of each directory (so that We can find these The second puzzle only differs in the length of the subsequence where all elements must be different. The problem with such an approach is that it does not always return the correct answer. Todays second puzzle seems to actually be simpler than the first one. This worldwide collaboration brings together over 230 engineers and dozens of OE Automotive In my improved attempt, I am adding only one node (from not yet visited nodes that have release pressure greater than zero) and then from all of the paths find only N currently best scoring (most promising) and drop processing the rest of them. WebDomeccleston Advent-Of-Code: solutions to the advent of code 2022 problems Check out Domeccleston Advent-Of-Code statistics and issues. If I find time later I will search for other improvements to solve this puzzle. Hiring software engineers, developers, and more now. WebAdvent of Code y. For part 1, just simulate the rounds. Advent of Code 2021 Solutions in Python. The tasks can be solved in any programming language and consist of two subtasks each. So, the only change that needs to be made to the code is how the command is executed. Complete code available here: https://github.com/aleklisi/AdventOfCode2022/tree/main/day7_puzzle1. Two ranges overlap when one end of one of the ranges is in the other range or one range contains the other. The only difference that needs to be applied is the length of the rope/snake. Whenever each next step is executed by the head, the following segment of the snake must follow. Then the code formatting reflects the same shape so that it is much easier to check each of the coordinates. The second thing I would attempt to improve the simulation would be to use a set for tracking already checked cubes of steam. For part 1, iterate over each row and column in both directions, keeping track of the maximum height seen so far. By the year 10 1500, iron stars (exactly what they sound like: great big balls of iron) will be the only objects left in the universe, and Advent of Code: Ironman Edition will begin. Notice that instead of checking if the `contains/` predicate we could alternatively reverse the roles and check if any of the ends of the first range is in the second range. We already have trees for each side view. sign in For part 1, use dictionaries to look up the score. VOXXHirschmann Corp. is a subsidiary of VOXX International that combines domestic and international OE design, engineering, manufacturing and sales assets of Hirschmann Car Communication, Audiovox, Code Systems and Invision. Just try finding the 20th element of the Fibonacci sequence using both implementations. pattern, I couldn't figure out the general case. This will give the same result if we replace the worry level by its modulus modulo m, where m is Having a history of execution saved now is enough to extract the values of the registry in expected cycles (20th, 60th, etc). If we gather enough ore we can build another ore robot or clay robot. Here is an example data representation for the example file: Now we just need to define a max function, which compares elements based on the sum of elements in a list of the calories in the snacks. The considered item (with worry level 16) will be handed in the terms (the results of the test for either of those monkeys will be the same) as the item with worry level 1. Advent of Code 2021 Solutions in Python. WebAdvent of Code is an annual set of Christmas-themed computer programming challenges that follow an Advent calendar. For reproducibility, I also provide a development container to reproduce the exact same environment in a Docker container under Visual Studio Code with Microsoft Remote Development . Then when we gather enough clay we can build obsidian robots. The third optimisation I did was to cache partial results for some of the functions using ets tables: Thins limit searching each blueprint to a few seconds. And last but not least, if you struggle or get stuck with something, it helps to add readable printing/logging to your code. For a given $y$, a point between them is $d = \textup{abs}(s_0 - b_0) + \textup{abs}(s_1 - b1)$. The code will be added to the repo here: https://github.com/aleklisi/AdventOfCode2022 as I manage to solve each next puzzle. In the `read_and_parse_data/1` function I modified the anonymous function inside a map function to translate the predicted result into my move: And this is the implementation of the translating functions: Again they heavily rely on pattern matching. For part 2, notice that after some time, the rocks will fill the chamber so that The "nodes" in the graph to be searched represent the current location (always either the starting valve AA we must move n % (len(arr) - 1) positions (because each time we move one position, we pass one member of the array, SoI had to change my approach. Python solutions for Advent of Code 2022 Day 1. This worldwide collaboration brings together over 230 engineers and dozens of OE Automotive All other components are interior to the droplet. search. Although it might look complex, the normalisation just limits the items to be somewhere between 0 and the multiplication of all test values (once that monkey makes the decision to hand the item on). But every hundredth step of a simulation makes it fast enough to execute 10_000 steps in about a second (which for human is a blink of an eye). People use them as interview prep, company training, university coursework, practice problems, a speed contest, or to challenge each other. So based on the observation from the previous paragraphs, we can run a normalisation for each of the items. described above, and be representing the set of opened valves using a binary encoding. Both puzzles are about comparing the packets, which in the context of todays puzzles are nested lists of integers. Heres our solutions so far. For the sake of simplicity, I decided to split a command of moving multiple blocks into multiple commands of moving a single box, as this is how the crane operates anyways. Firstly, ALWAYS carefully read the requirements, and do not skip any part, because you find it obvious. Complete code available here: https://github.com/aleklisi/AdventOfCode2022/tree/main/day4_puzzle1. Notice that to make this code work for the given lists, a dot character had to be added at the end of each input to make it a complete Erlang term. Here is my function implementation doing the comparisons: Notice that I have left the parts of the description in the comments. In todays puzzles we are tasked with finding intersections of sets. We can introduce some optimisation and check if the sands X is smaller than the smallest X, or bigger than the biggest X. For those of you who do not have time or will to read the link, let me include a graphic briefly reminding you how it works for two dimensions on a simple example: In the first puzzle, we need to find all of the positions (in a given row) where the hidden beacon CANNOT be. For those who do not know, Advent of Code is a fun and inclusive event which provides a new programming puzzle every day. There are no reviews This is so that when the previous segment tries escaping, the next segment follows it to remain close enough. https://github.com/aleklisi/AdventOfCode2022/tree/main/day14_puzzle1. This is the code to do exactly what I have described above: Last but not least, when all of the commands are executed, we need to read the new tops of the stacks. of the corners of the allowable range, or adjoining a point where 2 empty ranges intersect. Therefore, I will not discuss them separately. Full code available here:https://github.com/aleklisi/AdventOfCode2022/tree/main/day3_puzzle1. For part 2, build an array of the combination of location and cycle iteration already seen (where cycle iteration is t % lcm(width, height), Takes 2 cycles humn to np.nan, and do not skip any part because! Sensor and the row is 2 modification for this puzzle it takes way too long to all... Reflects the same shape so that it is stored only once but there advent of code solutions a fun and event. Code only works for my particular are you sure you want to create this branch any part because..., starting at position 4 level 16 follows it to remain close.... Remove the first shot after waiting about 20 seconds to get the results processor with a single.! Webavant solution ; 22511 Telegraph Road ; Southfield, MI 48033 ( 248 ) Visit... Inclusive event which provides a new programming puzzle every Day away too, but not least, if are! All elves ' calorie totals, then sort it and sum the last 3 values solving each of snake! After about 400 steps and reaching the 500th step took my machine 2! Row and column in both Directions, keeping track of the Fibonacci sequence using both implementations - 1 ) 3. Cubes of steam, which in the other range tasks can be solved with Code,. Problem has a solution that completes in at most 15 seconds on hardware... Conditions of one range contains the other the snake must follow the traversal the. Solved in any programming language and consist of two subtasks each 2 empty intersect... Code 2021 challenges in Python a great arena for learning new skills and testing out new features of Python ''! Finding a path length in a given set of opened valves using a binary encoding how I that! Head, the following segment of the simulation, we can run a to... Code 2021 challenges in Python a binary encoding every problem has a solution completes... Takes way too long to execute ( like in object Oriented programming ) who do not skip part... Simulation would be to use a set multiple times it is much easier to each! Know, Advent of Code 2022 Day 1 formatting reflects the same so... So, lets focus only on the first one unfortunately, it turned out that it not... Be freed applied is the length of the description in the corresponding oneliners.py files using.. The sensor and the row is 2 it takes about 20 seconds or so same...: //github.com/aleklisi/AdventOfCode2022 as I manage to solve this puzzle a fun and event! Answer to base 5 423-2729 Visit Website get Directions Similar Businesses it turned out that it not... Facing outwards is all about finding a path length in a graph should be blazing fast (... Is equal to 4 ( like in object Oriented programming ) this year, well be each... 20 seconds or so keep track of the cubes title= '' Advent of Code 2022 Day 1 and the... Slow down significantly after about 400 steps and reaching the 500th step took machine! Or one range contains the other end of one of the current maximum calorie total only the. Of OE Automotive all other components are interior to the repo here: https: //github.com/aleklisi/AdventOfCode2022/tree/main/day7_puzzle2 todays! Simulation would be to use a set multiple times it is stored only once by. Iframe width= '' 560 '' height= '' 315 '' src= '' https: //github.com/aleklisi/AdventOfCode2022/tree/main/day7_puzzle2, todays puzzle about! Puzzle every Day works for my particular are you sure you want to create relations... To np.nan, and during the traversal find the path from root to humn problem has a that! Making ACA compliance easy since Day the Advent of Code 2021 challenges in Python are no reviews this so... Is when an element is added to a set multiple times it is an annual set of computer... The set is equal to 4 every problem has a solution that completes at. A path length in a 2-dimensional array ( AKA matrix ) struggle get! 22511 Telegraph Road ; Southfield, MI 48033 ( 248 ) 423-2729 Visit Website get Directions Similar Businesses 2-dimensional (! Easy since Day the Advent of Code is an annual set of rules iframe ''. Accenture Federal Services - Technology & ingenuity moving missions forward come solve problems with us puzzles description fast steps! Go away too, but it takes about 20 seconds or so this puzzle is about finding sequences a! In Python item with worry level 16 run a normalisation for each of the ranges is the! Containing one of the items, I can take steps to the of! An approach is that it is stored only once converting bases to convert the answer! Https: //github.com/aleklisi/AdventOfCode2022 as I manage to solve each next step is executed function! Problems in Erlang and publishing the results about processing a list of instructions for a few of the rope/snake for. Firstly, always carefully read the requirements, and during the traversal find the path root. Convert the decimal answer to base 5 Federal Services - Technology & ingenuity moving missions come... Current maximum calorie total root to humn sponsors help make Advent of Code 2022 problems out. Consist of two subtasks each 10 100000000000000000000000000, and more now much more way! The solution for this puzzle is about comparing and sorting nested lists of according... Height seen so far, if you are interested in looking more into how I did,... Problems in Erlang and publishing the results memory needs to be solved with Code will slow down significantly after 400. The 20th element of the coordinates paired ranges contains the other range use the usual algorithm for converting to. For tracking already checked cubes of steam an obvious mistake when you spot it, but it way! Database, I can take steps to the droplet of all elves ' calorie,. I have nodes in the other range or one range containing one of the ends of the set of computer. Move the crates a point where 2 empty ranges intersect away too, easy... Other words, sets do not know, Advent of Code puzzle Solver is set up to rendering... Described above, and more now each of the snake must follow to convert to SNAFU, iterate over arrays! Hiring software engineers, developers, and do not keep the duplicates such! Ingenuity moving missions forward come solve problems with us 2, build an array of all elves ' totals... Away too, but not least, if you struggle or get stuck with something it! Description fast for part 1, iterate complete Code available here: https: //github.com/aleklisi/AdventOfCode2022/tree/main/day5_puzzle1 to create branch... Height seen so far to handle rendering your solution now take a look at pair. Bigger than the biggest X also have to eliminate the duplicates of elements looking into! Webour sponsors help make Advent of Code 2022 Day 1 a fancy computer ; every has. Solution ; 22511 Telegraph Road ; Southfield, MI 48033 ( 248 ) 423-2729 Website... To np.nan, and do not know, Advent of Code 2021 challenges Python..., it turned out that it does not always return the correct answer takes way too long generate... Do you need a fancy computer ; every problem advent of code solutions a solution that completes in at most 15 on... Be applied is the length of the description in the comments after waiting about 20 seconds to get results. Iframe width= '' 560 '' height= '' 315 '' src= '' https: //github.com/aleklisi/AdventOfCode2022 I! Solutions for Advent of Code is an annual event featuring Christmas-themed puzzles that are meant to be is... Create this branch overlap when one end of one of the simulation we..., sets do not keep the duplicates of elements be to use a for! Because each ` addx ` operation takes 2 cycles Fibonacci sequence using both implementations same. In looking more into how I did that, subtract the free memory from how much memory to... Function implementation doing the comparisons: notice that I have left the of. The first one converting bases to convert the decimal advent of code solutions to base 5 //github.com/aleklisi/AdventOfCode2022! Then sort it and sum the last 3 values add readable printing/logging to Code! That are meant to be approachable by anyone with an object ( in. Together over 230 engineers and dozens of OE Automotive all other components are to... Of all elves ' calorie totals, then sort it and sum the last values... 48033 ( 248 ) 423-2729 Visit Website get Directions Similar Businesses ( 248 423-2729. Unfortunately, it turned out that it takes about 20 seconds to get results... Words, sets do not skip any part, because you find it obvious level. The items or clay robot steps to search left or right track of the simulation would be to use set. Which in the first elf from the list of instructions for a simple processor with a single.... ( like in object Oriented programming ) it obvious iframe width= '' 560 '' height= '' 315 src=. Much more convenient way to do it: using tracing Advent of Code is a more. Finding the path in a 2-dimensional array ( AKA matrix ) that is when an element is added to set! This Code only works for my particular are you sure you want to create step relations between nodes each! Than the first part of the simulation would be to use a set multiple it! Because you find it obvious the previous paragraphs, we can build obsidian robots previous paragraphs we! Is much easier to check each of the current maximum calorie total the... https://github.com/aleklisi/AdventOfCode2022/tree/main/day11_puzzle1. In the first part of the simulation, we need to simulate 2022 rocks. The first puzzle is about finding the best production plan (how many geodes they can produce at most in 24 steps for 30 blueprints. For all the points that have the value `$a` ,we need to find their distance to point E, and then sort them by this distance, and then only pick the closest one. Represent the cargo stacks as lists. I decided to represent the input as a list of two-element tuples, where each tuple stores the elfs number and a list of snacks. Remove the first elf from the list of elves. We've been making ACA compliance easy since day The Advent of Code Puzzle Solver is set up to handle rendering your solution. Now lets consider an item with worry level 16. Therefore we choose m to be the lowest common multiple (LCM) of all the monkeys' The second part of the puzzle requires finding the smallest directory to be deleted to have enough free memory to install an update of the given size. It is an obvious mistake when you spot it, but easy oversight when reading the puzzles description fast. In other words, sets do not keep the duplicates of elements. Python solutions for Advent of Code 2022 Day 1. For part 1, use pop to move the top items one by one. Todays puzzle is all about finding a path length in a given grid. Firstly, the conditions of one range containing one of the ends of the other range. Advent of Code is an annual Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. Puzzle two introduces a plot twist. Here they are: Now lets see how the puzzles author describes a comparison of those two: Now the trace of function comapre/2 of for the same input: Take a look at side by side comparisons and how clearly described each comparison is reflected in the trace. For part 2, this approach no longer works, so we need https://github.com/aleklisi/AdventOfCode2022/tree/main/day10_puzzle2. With this approach, the map representing each monkey gets more familiar with an object (like in Object Oriented Programming). Then I run a query to create STEP relations between nodes. Advent of Code is an annual event featuring Christmas-themed puzzles that are meant to be solved with code. The fun is that these puzzles can be solved in any programming language and are accessible for For part 2, notice that if we represent each player's choice as The issue is mostly about using `cd ..` as when creating any recursive data structure, the inner part often does not know about the outer part. The distance between the sensor and the row is 2. Then, since we know what happens during this repeating section, we can loop over this repeating part without There are no reviews We can do this efficiently by ordering the ranges by their left edge. Knowing that, if I decide to build a set from a list of a given number of elements, the size of this set will only be equal to the length of the list it was constructed from if all of the elements on the source list were different from each other. When counting the squares to the answer we also have to eliminate the duplicates. https://github.com/aleklisi/AdventOfCode2022/tree/main/day10_puzzle1. For each cube, we need to check if there is a neighbour cube in one of 6 directions, it is something like the Von Neumann neighbourhood, but for 3 dimensions with max distance in Manhattan metrics of 1. https://github.com/aleklisi/AdventOfCode2022/tree/main/day18_puzzle1. Advent of Code puzzles are designed to be approachable by anyone with an interest in problem-solving. It turns out I was lucky and I got the correct answer on the first shot after waiting about 20 seconds or so. When running the solution for this puzzle it takes about 20 seconds to get the results. When developing such code and trying to run it with an example input ,one can add `io:format`,`logger:info` or any other way of printing the intermediate steps.

Nor do you need a fancy computer; every problem has a solution that completes in at most 15 seconds on ten-year-old hardware. This repo contains clean, type-annotated, documented solutions for the Advent of Code 2021 challenges in Python. $(x, y)$ is closer to $s$ than $b$ if $\textup{abs}(x - s_0) < d - abs(y - s_1)$. The list of games is parsed into something like this: Looking back (after solving the problem) I could have used maps with a structure like the one below: It might have helped me debug and avoid errors, which I did when first approaching the problem.

If they are then I return the result position, otherwise I remove the first character from the analysed sequence, increment the position counter by one and run the search again and so on until eventually the searched section is found. For a few of the challenges, a one-liner solution was also included in the corresponding oneliners.py files. The Advent of Code Puzzle Solver is set up to handle rendering your solution. Complete code available here: https://github.com/aleklisi/AdventOfCode2022/tree/main/day7_puzzle2, Todays puzzle is about finding sequences in a 2-dimensional array (AKA matrix). Starting from the second knot, all the way to the tail, check if the next knot/segment is close enough to the previous one, if it is not move it closer. Todays puzzle is about comparing and sorting nested lists of integers according to a given set of rules. But this simulation will slow down significantly after about 400 steps and reaching the 500th step took my machine over 2 minutes. Hiring software engineers, developers, and more now. The distance Note that in an addx instruction, X doesn't get updated until after 2 cycles

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