parent
5ed8eb6433
commit
b2cabd079b
@ -1,3 +1,71 @@ |
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import Instruction.Type.* |
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import java.io.File |
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const val limit = 300; |
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data class Instruction(val type: Type, val value: Int) { |
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enum class Type { |
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NOOP, |
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ADDX |
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} |
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} |
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fun main() { |
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println("Hello World!") |
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val instructions = MutableList<Instruction>(0) { Instruction(NOOP, 0) }; |
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val cyclesOfInterest = setOf(20, 60, 100, 140, 180, 220) |
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for (line in File("c.input").readLines()) { |
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if (line.isEmpty()) continue; |
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val s = line.split(" "); |
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if (s[0] == "noop") { |
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instructions.add(Instruction(NOOP, 0)); |
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} |
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if (s[0] == "addx") { |
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instructions.add(Instruction(ADDX, s[1].toInt())); |
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} |
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} |
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for (i in instructions) { |
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println("$i") |
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} |
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var signalSum = 0; |
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var cycle = 0; |
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var pc = 0; |
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var x = 1; |
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var command = instructions[cycle]; |
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var currentTimer = 0; |
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while (cycle < limit) { |
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// At the start of the first cycle, the noop instruction begins execution. |
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if (cycle % 40 == 0) print("\n") |
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if (currentTimer == 0) { |
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command = instructions[pc % instructions.count()] |
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when (command.type) { |
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NOOP -> currentTimer = 1 |
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ADDX -> currentTimer = 2 |
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} |
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} |
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// During the first cycle, X is 1. |
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val spriteLocations = setOf(x-1, x, x+1) |
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if (cycle % 40 in spriteLocations) print("#") |
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else print(".") |
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//println("during cycle ${cycle+1}, we're executing $command the register is $x") |
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signalSum += (cycle+1) * x |
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// After the first cycle, the noop instruction finishes execution, doing nothing. |
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currentTimer -= 1 |
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if (currentTimer == 0) { |
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// if the timer is at zero, we execute the existing command. |
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when (command.type) { |
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NOOP -> {} |
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ADDX -> x += command.value |
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} |
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pc++ |
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} |
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cycle += 1 |
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} |
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println("after all is said and done,, the sum is $signalSum") |
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} |
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