75 lines
1.2 KiB
Go
75 lines
1.2 KiB
Go
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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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fmt.Println("# Part 1")
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fmt.Println(part1(inp))
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fmt.Println("# Part 2")
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fmt.Println(part2(inp))
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}
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func part1(inp []string) int {
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var ret int
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for i := range inp {
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sack := inp[i]
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c1, c2 := sack[:len(sack)/2], sack[len(sack)/2:]
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var dupe byte
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for _, c1w := range c1 {
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for _, c2w := range c2 {
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if c1w == c2w {
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dupe = byte(c1w)
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break
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}
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}
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if dupe != 0 {
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break
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}
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}
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if dupe >= 'a' {
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ret += int(dupe - 'a' + 1)
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} else if dupe >= 'A' {
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ret += int(dupe - 'A' + 27)
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}
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}
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return ret
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}
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func part2(inp []string) int {
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var ret int
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elves := []string{"", "", ""}
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for i := range inp {
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elves[i%3] = inp[i]
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if i%3 == 2 {
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var badge byte
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// Check 'em
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for _, e1 := range elves[0] {
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for _, e2 := range elves[1] {
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for _, e3 := range elves[2] {
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if e1 == e2 && e2 == e3 {
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badge = byte(e1)
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}
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}
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if badge != 0 {
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break
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}
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}
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if badge != 0 {
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break
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}
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}
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if badge >= 'a' {
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ret += int(badge - 'a' + 1)
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} else if badge >= 'A' {
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ret += int(badge - 'A' + 27)
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}
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}
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}
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return ret
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}
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