2020 Day 08, fix typo in test of 07
This commit is contained in:
Akumatic
parent
97125d8b50
commit
ab66e38e47
@ -27,5 +27,5 @@ def test():
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rules, amount = parseRules(input)
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rules, amount = parseRules(input)
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assert part2(rules, amount) == 126
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assert part2(rules, amount) == 126
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if __name__ == "__name__":
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if __name__ == "__main__":
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test()
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test()
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95
2020/08/README.md
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95
2020/08/README.md
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@ -0,0 +1,95 @@
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# 2020 Day 1: Handheld Halting
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Copyright (c) Eric Wastl
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#### [Direct Link](https://adventofcode.com/2020/day/8)
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## Part 1
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Your flight to the major airline hub reaches cruising altitude without incident. While you consider checking the in-flight menu for one of those drinks that come with a little umbrella, you are interrupted by the kid sitting next to you.
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Their [handheld game console](https://en.wikipedia.org/wiki/Handheld_game_console) won't turn on! They ask if you can take a look.
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You narrow the problem down to a strange **infinite loop** in the boot code (your puzzle input) of the device. You should be able to fix it, but first you need to be able to run the code in isolation.
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The boot code is represented as a text file with one **instruction** per line of text. Each instruction consists of an **operation** (`acc`, `jmp`, or `nop`) and an **argument** (a signed number like `+4` or `-20`).
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- `acc` increases or decreases a single global value called the **accumulator** by the value given in the argument. For example, `acc +7` would increase the accumulator by 7. The accumulator starts at `0`. After an `acc` instruction, the instruction immediately below it is executed next.
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- `jmp` **jumps** to a new instruction relative to itself. The next instruction to execute is found using the argument as an **offset** from the `jmp` instruction; for example, `jmp +2` would skip the next instruction, `jmp +1` would continue to the instruction immediately below it, and `jmp -20` would cause the instruction 20 lines above to be executed next.
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- `nop` stands for **No OPeration** - it does nothing. The instruction immediately below it is executed next.
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For example, consider the following program:
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```
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nop +0
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acc +1
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jmp +4
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acc +3
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jmp -3
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acc -99
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acc +1
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jmp -4
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acc +6
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```
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These instructions are visited in this order:
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```
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nop +0 | 1
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acc +1 | 2, 8(!)
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jmp +4 | 3
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acc +3 | 6
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jmp -3 | 7
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acc -99 |
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acc +1 | 4
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jmp -4 | 5
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acc +6 |
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```
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First, the `nop +0` does nothing. Then, the accumulator is increased from 0 to 1 (`acc +1`) and `jmp +4` sets the next instruction to the other `acc +1` near the bottom. After it increases the accumulator from 1 to 2, `jmp -4` executes, setting the next instruction to the only `acc +3`. It sets the accumulator to 5, and `jmp -3` causes the program to continue back at the first `acc +1`.
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This is an **infinite loop**: with this sequence of jumps, the program will run forever. The moment the program tries to run any instruction a second time, you know it will never terminate.
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Immediately **before** the program would run an instruction a second time, the value in the accumulator is **`5`**.
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Run your copy of the boot code. Immediately before any instruction is executed a second time, **what value is in the accumulator?**
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## Part 2
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After some careful analysis, you believe that **exactly one instruction is corrupted**.
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Somewhere in the program, **either** a `jmp` is supposed to be a `nop`, **or** a `nop` is supposed to be a `jmp`. (No `acc` instructions were harmed in the corruption of this boot code.)
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The program is supposed to terminate by **attempting to execute an instruction immediately after the last instruction** in the file. By changing exactly one `jmp` or `nop`, you can repair the boot code and make it terminate correctly.
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For example, consider the same program from above:
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```
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nop +0
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acc +1
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jmp +4
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acc +3
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jmp -3
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acc -99
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acc +1
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jmp -4
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acc +6
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```
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If you change the first instruction from `nop +0` to `jmp +0`, it would create a single-instruction infinite loop, never leaving that instruction. If you change almost any of the `jmp` instructions, the program will still eventually find another `jmp` instruction and loop forever.
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However, if you change the second-to-last instruction (from `jmp -4` to `nop -4`), the program terminates! The instructions are visited in this order:
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```
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nop +0 | 1
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acc +1 | 2
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jmp +4 | 3
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acc +3 |
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jmp -3 |
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acc -99 |
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acc +1 | 4
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nop -4 | 5
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acc +6 | 6
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```
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After the last instruction (`acc +6`), the program terminates by attempting to run the instruction below the last instruction in the file. With this change, after the program terminates, the accumulator contains the value **`8`** (`acc +1`, `acc +1`, `acc +6`).
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Fix the program so that it terminates normally by changing exactly one `jmp` (to `nop`) or `nop` (to `jmp`). **What is the value of the accumulator after the program terminates?**
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52
2020/08/code.py
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52
2020/08/code.py
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@ -0,0 +1,52 @@
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# SPDX-License-Identifier: MIT
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# Copyright (c) 2020 Akumatic
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#
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#https://adventofcode.com/2020/day/8
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def readFile() -> list:
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with open(f"{__file__.rstrip('code.py')}input.txt", "r") as f:
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return [line.split() for line in f.read().strip().split("\n")]
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def run(instructions: list) -> tuple:
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accumulator = 0
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pointer = 0
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visited = []
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size = len(instructions)
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while pointer not in visited and pointer != size:
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visited.append(pointer)
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if instructions[pointer][0] == "acc":
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accumulator += int(instructions[pointer][1])
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pointer += 1
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elif instructions[pointer][0] == "jmp":
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pointer += int(instructions[pointer][1])
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else: # instructions[pointer][0] == "nop":
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pointer += 1
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return pointer, accumulator
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def part1(instructions: list) -> int:
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return run(instructions)[1]
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def part2(instructions: list) -> int:
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size = len(instructions)
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for i in range(size):
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if instructions[i][0] == "jmp":
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instructions[i][0] = "nop"
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pointer, accumulator = run(instructions)
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instructions[i][0] = "jmp"
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elif instructions[i][0] == "nop":
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instructions[i][0] = "jmp"
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pointer, accumulator = run(instructions)
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instructions[i][0] = "nop"
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else: # instructions[i][0] == "acc"
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continue
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if pointer == size:
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return accumulator
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if __name__ == "__main__":
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instructions = readFile()
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print(f"Part 1: {part1(instructions)}")
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print(f"Part 2: {part2(instructions)}")
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611
2020/08/input.txt
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611
2020/08/input.txt
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@ -0,0 +1,611 @@
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acc +22
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acc +42
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nop +456
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jmp +5
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acc +31
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acc +49
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acc +10
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jmp +519
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nop +390
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jmp +418
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nop +29
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acc -4
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jmp +156
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jmp +85
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acc +5
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acc +26
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jmp +497
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acc -6
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acc -18
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acc +20
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acc +4
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jmp -8
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jmp +372
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jmp +371
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jmp -1
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jmp +1
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nop +378
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acc +18
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jmp +388
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jmp +1
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acc +29
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acc +37
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jmp +1
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jmp +425
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acc +19
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acc +13
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jmp +477
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acc +7
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jmp +469
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nop +495
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nop +141
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acc +22
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jmp +517
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jmp +125
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nop +30
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acc +37
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acc +23
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nop +238
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jmp +110
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jmp +411
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acc +2
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acc -19
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acc -19
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jmp +296
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acc +0
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acc +14
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acc +20
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jmp +75
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nop +88
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acc -16
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acc +40
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acc +27
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jmp +131
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acc +33
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nop +252
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acc +5
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acc +0
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jmp +101
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nop +219
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acc +50
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acc +40
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jmp +49
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nop +74
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jmp +327
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acc +47
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jmp +206
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acc -15
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jmp +449
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acc -17
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acc -13
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acc +46
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jmp +417
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jmp +160
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acc -7
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acc -11
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acc +16
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acc +14
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jmp -37
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acc -12
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acc +15
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acc -14
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nop +110
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jmp +1
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acc -4
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nop +287
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nop -82
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jmp +30
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jmp +490
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acc +34
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jmp +305
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nop +90
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jmp +1
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nop -4
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nop -95
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jmp -46
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acc +26
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acc +13
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acc +47
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jmp +350
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acc +11
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jmp -102
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acc -2
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jmp +489
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acc +28
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acc +24
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nop +486
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jmp +485
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nop +170
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jmp +66
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jmp +411
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acc +30
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acc +48
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acc +48
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jmp -6
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acc +11
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jmp -51
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jmp +1
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jmp -10
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nop +411
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acc -17
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acc +32
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jmp +9
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jmp +398
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nop +82
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jmp +6
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acc +45
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acc +34
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jmp -44
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acc -13
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jmp -122
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acc +25
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nop +286
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acc +5
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jmp +144
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acc +0
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jmp -122
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acc -11
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acc -6
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jmp -123
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acc +16
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acc +1
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jmp -58
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nop +242
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acc -11
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jmp +257
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nop +231
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acc +46
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jmp +301
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acc -6
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acc +20
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acc -7
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jmp +365
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acc +32
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acc +0
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jmp -66
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jmp +110
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acc -18
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jmp +118
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acc +33
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nop -125
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acc +49
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acc +36
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jmp +188
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acc +9
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acc -11
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jmp +100
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acc +35
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jmp +55
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acc +38
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acc -1
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jmp +312
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jmp +157
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acc +17
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jmp +177
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nop -126
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acc +30
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acc -3
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jmp +211
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acc -3
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jmp -164
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jmp -112
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acc +50
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jmp +268
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nop +290
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acc -8
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acc +35
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jmp -44
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acc -6
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acc +11
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nop +327
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jmp +155
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acc +10
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acc +35
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nop +233
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jmp +330
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acc +31
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acc +8
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jmp +124
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acc -5
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jmp +300
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nop +171
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nop +4
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acc +19
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acc +41
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jmp -156
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nop +179
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acc +12
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jmp +160
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jmp -92
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acc -11
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acc -10
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jmp +95
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nop +94
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acc -8
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jmp -199
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acc +16
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acc +30
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nop +73
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acc +36
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jmp -53
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jmp +1
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jmp -6
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nop +369
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acc +29
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acc +47
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jmp +32
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acc +35
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jmp -61
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acc +41
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jmp +352
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acc -1
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jmp +75
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acc -10
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acc +28
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acc -15
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jmp -187
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acc +6
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jmp +1
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nop +112
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jmp +273
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nop +186
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acc +11
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acc +40
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jmp +128
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acc +17
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acc +23
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acc -8
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nop +277
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jmp +42
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acc +11
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nop -237
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acc +36
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acc +32
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jmp +287
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acc +16
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acc -19
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jmp +115
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acc -6
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acc +16
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nop -2
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acc +23
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||||||
|
jmp -160
|
||||||
|
acc -10
|
||||||
|
acc -10
|
||||||
|
jmp +26
|
||||||
|
acc -7
|
||||||
|
jmp -95
|
||||||
|
nop -160
|
||||||
|
acc -2
|
||||||
|
acc +44
|
||||||
|
jmp -236
|
||||||
|
jmp -198
|
||||||
|
jmp +1
|
||||||
|
acc +1
|
||||||
|
jmp -9
|
||||||
|
jmp -95
|
||||||
|
jmp +273
|
||||||
|
acc -19
|
||||||
|
jmp -46
|
||||||
|
acc +12
|
||||||
|
acc +2
|
||||||
|
jmp -145
|
||||||
|
acc -14
|
||||||
|
acc +3
|
||||||
|
acc +3
|
||||||
|
jmp +250
|
||||||
|
acc +4
|
||||||
|
acc +40
|
||||||
|
jmp +1
|
||||||
|
jmp +17
|
||||||
|
acc +6
|
||||||
|
acc +47
|
||||||
|
jmp -77
|
||||||
|
nop -192
|
||||||
|
acc +11
|
||||||
|
jmp +296
|
||||||
|
acc -14
|
||||||
|
jmp +64
|
||||||
|
acc +35
|
||||||
|
jmp +134
|
||||||
|
acc -8
|
||||||
|
nop +228
|
||||||
|
acc +24
|
||||||
|
acc +15
|
||||||
|
jmp -64
|
||||||
|
jmp -241
|
||||||
|
acc +19
|
||||||
|
acc +22
|
||||||
|
acc +49
|
||||||
|
nop -193
|
||||||
|
jmp +219
|
||||||
|
acc -1
|
||||||
|
acc -11
|
||||||
|
nop +211
|
||||||
|
acc +0
|
||||||
|
jmp -106
|
||||||
|
nop +101
|
||||||
|
jmp -222
|
||||||
|
acc +20
|
||||||
|
acc +45
|
||||||
|
jmp +70
|
||||||
|
acc +19
|
||||||
|
acc +21
|
||||||
|
jmp -23
|
||||||
|
acc +8
|
||||||
|
nop +92
|
||||||
|
acc +47
|
||||||
|
jmp -144
|
||||||
|
acc +0
|
||||||
|
acc -1
|
||||||
|
jmp -81
|
||||||
|
acc +23
|
||||||
|
jmp -274
|
||||||
|
acc +14
|
||||||
|
acc +26
|
||||||
|
acc +9
|
||||||
|
jmp +79
|
||||||
|
acc +22
|
||||||
|
jmp -331
|
||||||
|
acc -10
|
||||||
|
jmp -311
|
||||||
|
acc +16
|
||||||
|
acc +30
|
||||||
|
acc -8
|
||||||
|
jmp +176
|
||||||
|
acc -19
|
||||||
|
acc +43
|
||||||
|
jmp -222
|
||||||
|
nop -116
|
||||||
|
jmp +18
|
||||||
|
acc +26
|
||||||
|
acc +23
|
||||||
|
acc +6
|
||||||
|
jmp -162
|
||||||
|
acc +34
|
||||||
|
jmp +95
|
||||||
|
acc +27
|
||||||
|
acc +40
|
||||||
|
acc +9
|
||||||
|
jmp -77
|
||||||
|
jmp +137
|
||||||
|
acc -13
|
||||||
|
acc +21
|
||||||
|
acc +17
|
||||||
|
acc -5
|
||||||
|
jmp +91
|
||||||
|
jmp -95
|
||||||
|
acc +18
|
||||||
|
acc -1
|
||||||
|
jmp +70
|
||||||
|
jmp -355
|
||||||
|
nop -166
|
||||||
|
acc -19
|
||||||
|
acc +16
|
||||||
|
jmp -146
|
||||||
|
jmp -135
|
||||||
|
jmp +57
|
||||||
|
acc +45
|
||||||
|
jmp -62
|
||||||
|
acc -14
|
||||||
|
jmp -382
|
||||||
|
nop -172
|
||||||
|
acc +45
|
||||||
|
jmp -77
|
||||||
|
acc +13
|
||||||
|
jmp +65
|
||||||
|
acc -4
|
||||||
|
jmp +112
|
||||||
|
jmp +107
|
||||||
|
jmp +26
|
||||||
|
jmp -326
|
||||||
|
acc +25
|
||||||
|
jmp +1
|
||||||
|
jmp +179
|
||||||
|
acc +33
|
||||||
|
acc +2
|
||||||
|
jmp -222
|
||||||
|
nop +36
|
||||||
|
acc +25
|
||||||
|
nop -244
|
||||||
|
jmp -376
|
||||||
|
jmp -203
|
||||||
|
acc +26
|
||||||
|
nop +109
|
||||||
|
acc +38
|
||||||
|
jmp +135
|
||||||
|
acc +7
|
||||||
|
acc +40
|
||||||
|
acc -18
|
||||||
|
jmp -113
|
||||||
|
nop -294
|
||||||
|
acc +0
|
||||||
|
acc +40
|
||||||
|
nop -265
|
||||||
|
jmp +81
|
||||||
|
jmp -99
|
||||||
|
jmp +32
|
||||||
|
acc -17
|
||||||
|
acc +25
|
||||||
|
acc -12
|
||||||
|
acc +26
|
||||||
|
jmp -125
|
||||||
|
acc -3
|
||||||
|
acc -7
|
||||||
|
acc +25
|
||||||
|
jmp -410
|
||||||
|
acc +47
|
||||||
|
acc +36
|
||||||
|
jmp +35
|
||||||
|
acc +2
|
||||||
|
acc +18
|
||||||
|
acc -3
|
||||||
|
jmp -38
|
||||||
|
acc +29
|
||||||
|
acc +49
|
||||||
|
jmp -299
|
||||||
|
acc -4
|
||||||
|
nop -422
|
||||||
|
jmp +50
|
||||||
|
acc +11
|
||||||
|
acc +2
|
||||||
|
acc +49
|
||||||
|
jmp -233
|
||||||
|
acc +12
|
||||||
|
acc +43
|
||||||
|
acc -19
|
||||||
|
acc +11
|
||||||
|
jmp -264
|
||||||
|
jmp +124
|
||||||
|
jmp -361
|
||||||
|
acc +35
|
||||||
|
jmp -118
|
||||||
|
acc +23
|
||||||
|
acc -16
|
||||||
|
acc -14
|
||||||
|
jmp -22
|
||||||
|
jmp -135
|
||||||
|
jmp -309
|
||||||
|
acc +6
|
||||||
|
jmp -44
|
||||||
|
acc -12
|
||||||
|
acc +0
|
||||||
|
jmp -23
|
||||||
|
acc +29
|
||||||
|
acc -8
|
||||||
|
acc +18
|
||||||
|
acc +35
|
||||||
|
jmp -111
|
||||||
|
acc +22
|
||||||
|
acc +23
|
||||||
|
acc +0
|
||||||
|
acc -8
|
||||||
|
jmp -55
|
||||||
|
acc +14
|
||||||
|
jmp +1
|
||||||
|
acc +44
|
||||||
|
acc +17
|
||||||
|
jmp -272
|
||||||
|
acc +39
|
||||||
|
nop +37
|
||||||
|
acc -19
|
||||||
|
jmp -323
|
||||||
|
acc +24
|
||||||
|
acc +28
|
||||||
|
acc +29
|
||||||
|
acc +37
|
||||||
|
jmp +110
|
||||||
|
jmp -386
|
||||||
|
nop -352
|
||||||
|
acc +23
|
||||||
|
acc +38
|
||||||
|
jmp -369
|
||||||
|
acc -5
|
||||||
|
acc -14
|
||||||
|
jmp +83
|
||||||
|
jmp +17
|
||||||
|
jmp -151
|
||||||
|
jmp -118
|
||||||
|
jmp -104
|
||||||
|
jmp -341
|
||||||
|
acc +32
|
||||||
|
acc +43
|
||||||
|
jmp -52
|
||||||
|
acc -4
|
||||||
|
acc +42
|
||||||
|
acc +5
|
||||||
|
jmp -116
|
||||||
|
acc +13
|
||||||
|
jmp +1
|
||||||
|
nop -361
|
||||||
|
acc +41
|
||||||
|
jmp -386
|
||||||
|
jmp -241
|
||||||
|
nop -449
|
||||||
|
acc +46
|
||||||
|
jmp -176
|
||||||
|
acc +6
|
||||||
|
jmp +60
|
||||||
|
jmp +1
|
||||||
|
jmp -3
|
||||||
|
jmp -62
|
||||||
|
acc -14
|
||||||
|
acc +17
|
||||||
|
jmp -340
|
||||||
|
acc +31
|
||||||
|
acc -13
|
||||||
|
acc +7
|
||||||
|
jmp -54
|
||||||
|
jmp -80
|
||||||
|
acc +14
|
||||||
|
acc +49
|
||||||
|
acc +34
|
||||||
|
jmp +24
|
||||||
|
acc +11
|
||||||
|
jmp -158
|
||||||
|
acc -13
|
||||||
|
jmp -261
|
||||||
|
acc +33
|
||||||
|
nop -171
|
||||||
|
jmp -106
|
||||||
|
acc +0
|
||||||
|
acc +9
|
||||||
|
acc +16
|
||||||
|
acc +34
|
||||||
|
jmp +18
|
||||||
|
acc -2
|
||||||
|
acc +47
|
||||||
|
acc +39
|
||||||
|
jmp -232
|
||||||
|
acc +23
|
||||||
|
nop -229
|
||||||
|
acc +30
|
||||||
|
acc +32
|
||||||
|
jmp -147
|
||||||
|
acc -8
|
||||||
|
jmp -460
|
||||||
|
jmp -498
|
||||||
|
nop -218
|
||||||
|
acc +31
|
||||||
|
acc +44
|
||||||
|
acc +30
|
||||||
|
jmp -105
|
||||||
|
acc +8
|
||||||
|
acc -19
|
||||||
|
acc +45
|
||||||
|
nop -49
|
||||||
|
jmp -140
|
||||||
|
nop -43
|
||||||
|
acc +42
|
||||||
|
jmp +1
|
||||||
|
acc -14
|
||||||
|
jmp -42
|
||||||
|
jmp -389
|
||||||
|
acc +39
|
||||||
|
acc +26
|
||||||
|
acc +38
|
||||||
|
jmp -77
|
||||||
|
acc +48
|
||||||
|
jmp -83
|
||||||
|
acc +5
|
||||||
|
jmp -81
|
||||||
|
nop -242
|
||||||
|
acc +35
|
||||||
|
acc +0
|
||||||
|
acc +19
|
||||||
|
jmp -430
|
||||||
|
acc +11
|
||||||
|
nop -226
|
||||||
|
acc +13
|
||||||
|
acc +23
|
||||||
|
jmp -575
|
||||||
|
acc +44
|
||||||
|
acc +50
|
||||||
|
nop -303
|
||||||
|
jmp -112
|
||||||
|
jmp -305
|
||||||
|
acc +23
|
||||||
|
acc -11
|
||||||
|
nop -376
|
||||||
|
acc +50
|
||||||
|
jmp +1
|
||||||
2
2020/08/solution.txt
Normal file
2
2020/08/solution.txt
Normal file
@ -0,0 +1,2 @@
|
|||||||
|
Part 1: 1782
|
||||||
|
Part 2: 797
|
||||||
13
2020/08/test_code.py
Normal file
13
2020/08/test_code.py
Normal file
@ -0,0 +1,13 @@
|
|||||||
|
# SPDX-License-Identifier: MIT
|
||||||
|
# Copyright (c) 2020 Akumatic
|
||||||
|
|
||||||
|
from code import part1, part2
|
||||||
|
|
||||||
|
def test():
|
||||||
|
instructions = [["nop", "+0"], ["acc", "+1"], ["jmp", "+4"],
|
||||||
|
["acc", "+3"], ["jmp", "-3"], ["acc", "-99"], ["acc", "+1"], ["jmp", "-4"], ["acc", "+6"]]
|
||||||
|
assert(part1(instructions) == 5)
|
||||||
|
assert part2(instructions) == 8
|
||||||
|
|
||||||
|
if __name__ == "__main__":
|
||||||
|
test()
|
||||||
@ -18,7 +18,7 @@ Collect stars by solving puzzles. Two puzzles will be made available on each day
|
|||||||
| 01 | :white_check_mark: | :white_check_mark: || 02 | :white_check_mark: | :white_check_mark: |
|
| 01 | :white_check_mark: | :white_check_mark: || 02 | :white_check_mark: | :white_check_mark: |
|
||||||
| 03 | :white_check_mark: | :white_check_mark: || 04 | :white_check_mark: | :white_check_mark: |
|
| 03 | :white_check_mark: | :white_check_mark: || 04 | :white_check_mark: | :white_check_mark: |
|
||||||
| 05 | :white_check_mark: | :white_check_mark: || 06 | :white_check_mark: | :white_check_mark: |
|
| 05 | :white_check_mark: | :white_check_mark: || 06 | :white_check_mark: | :white_check_mark: |
|
||||||
| 07 | :white_check_mark: | :white_check_mark: || 08 | | |
|
| 07 | :white_check_mark: | :white_check_mark: || 08 | :white_check_mark: | :white_check_mark: |
|
||||||
| 09 | | || 10 | | |
|
| 09 | | || 10 | | |
|
||||||
| 11 | | || 12 | | |
|
| 11 | | || 12 | | |
|
||||||
| 13 | | || 14 | | |
|
| 13 | | || 14 | | |
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user