41 lines
680 B
Go
41 lines
680 B
Go
package main
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import (
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"AoC2020/helper"
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"fmt"
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"os"
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)
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func main() {
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args := os.Args[1:]
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input, err := helper.GetInput(args[0])
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if err != nil {
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fmt.Println(err)
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}
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fmt.Println(day3(input, 3, 1))
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fmt.Println(day3Part2(input, [][]int{{1, 1}, {3, 1}, {5, 1}, {7, 1}, {1, 2}}))
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}
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func day3Part2(input []string, slopes [][]int) int {
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result := 1
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for _, slope := range slopes {
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result = result * day3(input, slope[0], slope[1])
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}
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return result
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}
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func day3(input []string, right int, down int) int {
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count := 0
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x := 0
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y := 0
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for y < len(input) {
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if string(input[y][x]) == "#" {
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count++
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}
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x = (x + right) % (len(input[0]))
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y = y + down
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}
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return count
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}
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