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@@ -84,6 +84,27 @@ func findEarliestBus(data schedule) int64 {
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return earliest * earliestID
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}
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+func alignBuses(data schedule) int64 {
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+ var advance int64 = 1
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+ var next int64 = 1
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+ var current int64
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+
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+ for _, item := range data.buses {
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+ current = next
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+ for {
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+ current += advance
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+ if (current+item.index)%item.id == 0 {
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+ next = current
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+ break
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+ }
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+ }
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+
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+ advance *= item.id
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+ }
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+
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+ return current
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+}
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+
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func main() {
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if len(os.Args) < 2 {
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log.Fatal("You need to specify a file!")
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@@ -101,4 +122,5 @@ func main() {
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}
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fmt.Println("Part1:", findEarliestBus(data))
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+ fmt.Println("Part2:", alignBuses(data))
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}
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