60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
package main
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import (
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"fmt"
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h "git.bullercodeworks.com/brian/adventofcode/helpers"
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)
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func main() {
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inp := h.StdinToStringSlice()
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part1(inp)
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fmt.Println()
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part2(inp)
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}
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func part1(inp []string) {
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c := h.StringSliceToCoordByteMap(inp)
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anC := h.StringSliceToCoordByteMap(inp)
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nodes := c.FindAllNot('.')
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for k, bt := range nodes {
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fNodes := c.FindAll(bt)
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for _, nd := range fNodes {
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if k.Equals(nd) {
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continue
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}
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diff := k.Sub(nd)
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an := k.Add(diff)
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if anC.ContainsCoord(an) {
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anC.Put(k.Add(diff), '#')
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}
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}
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}
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fmt.Println("# Part 1")
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fmt.Println("Antinodes:", anC.Count('#'))
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}
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func part2(inp []string) {
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c := h.StringSliceToCoordByteMap(inp)
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anC := h.StringSliceToCoordByteMap(inp)
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nodes := c.FindAllNot('.')
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for k, bt := range nodes {
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fNodes := c.FindAll(bt)
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for _, nd := range fNodes {
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anC.Put(nd, '#')
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anC.Put(k, '#')
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if k.Equals(nd) {
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continue
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}
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diff := k.Sub(nd)
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an := k.Add(diff)
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for anC.ContainsCoord(an) {
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anC.Put(an, '#')
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an = an.Add(diff)
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}
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}
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}
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fmt.Println("# Part 2")
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fmt.Println("Antinodes:", anC.Count('#'))
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}
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