45 lines
819 B
Go
45 lines
819 B
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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total := 1
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for _, slope := range []h.Coordinate{
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{X: 1, Y: 1},
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{X: 3, Y: 1},
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{X: 5, Y: 1},
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{X: 7, Y: 1},
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{X: 1, Y: 2},
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} {
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field := h.StringSliceToCoordByteMap(inp)
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val := countTrees(field, slope.X, slope.Y)
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total = total * val
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fmt.Println(slope.X, slope.Y, ":", val, "Trees")
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}
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fmt.Println("Total:", total)
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}
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func countTrees(field h.CoordByteMap, x, y int) int {
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trees := 0
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pos := h.Coordinate{X: x, Y: y}
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for pos.Y < field.Height {
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if pos.X >= field.Width {
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pos.X = pos.X - field.Width
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}
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if field.Get(pos) == '#' {
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trees++
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field.Put(pos, 'X')
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} else {
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field.Put(pos, 'O')
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}
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pos.Y = pos.Y + y
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pos.X = pos.X + x
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}
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return trees
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}
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