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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| fun main() { | ||
| val input = readInput("10") | ||
| // val input = readInput("10_test") | ||
|
|
||
| fun valuesAtCycle(input: List<String>, cycle: Int) : HashMap<Int, Int> { | ||
| val values: HashMap<Int, Int> = hashMapOf() | ||
| var currentCycle = 1 | ||
| var value = 1 | ||
|
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| values[1] = value | ||
|
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| for (i in 1 .. cycle) { | ||
| val cmd = input[i - 1] | ||
| if (cmd.startsWith("addx")) { | ||
| currentCycle += 2 | ||
|
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| if (currentCycle > cycle) { | ||
| break | ||
| } | ||
|
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| values[currentCycle - 1] = value | ||
| value += cmd.split(" ")[1].toInt() | ||
| values[currentCycle] = value | ||
| } else { | ||
| currentCycle += 1 | ||
| if (currentCycle > cycle) { | ||
| break | ||
| } | ||
|
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| values[currentCycle] = value | ||
| } | ||
| } | ||
|
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| if (values[cycle] == null) { | ||
| values[cycle] = value | ||
| } | ||
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| return values | ||
| } | ||
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| fun signalStrength(input: List<String>, cycle: Int) : Int { | ||
| val value = valuesAtCycle(input, cycle)[cycle] ?: 0 | ||
| return value * cycle | ||
| } | ||
|
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| fun part1(input: List<String>): Int { | ||
| val cycles = arrayListOf(20, 60, 100, 140, 180, 220) | ||
|
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| return cycles.sumOf { | ||
| signalStrength(input, it) | ||
| } | ||
| } | ||
|
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| fun part2(input: List<String>) { | ||
| val cycle = 240 | ||
| val valueRegister = valuesAtCycle(input, cycle) | ||
| var spriteX: Int | ||
|
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| var x = 1 | ||
| for (i in 1..cycle) { | ||
| spriteX = valueRegister[i] ?: 0 | ||
|
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| if (spriteX - x == 0 || x - spriteX == 1 || x - spriteX == 2) { | ||
| print("#") | ||
| } else { | ||
| print(".") | ||
| } | ||
|
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| x++ | ||
|
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| if (i % 40 == 0) { | ||
| x = 1 | ||
| println() | ||
| } | ||
| } | ||
| } | ||
|
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| println(part1(input)) | ||
| println(part2(input)) | ||
| } |