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https://github.com/Threnklyn/advent-of-code-go.git
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alexchao26
51 lines
719 B
Go
51 lines
719 B
Go
package main
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import (
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"github.com/alexchao26/advent-of-code-go/util"
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"fmt"
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"strings"
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)
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func main() {
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input := util.ReadFile("../input.txt")
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lines := strings.Split(input, "\n")
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var twos, threes int
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for _, boxID := range lines {
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if hasTwo(boxID) {
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twos++
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}
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if hasThree(boxID) {
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threes++
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}
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}
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fmt.Println("checksum", twos*threes)
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}
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func hasTwo(box string) bool {
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chars := make(map[rune]int)
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for _, c := range box {
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chars[c]++
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}
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for _, v := range chars {
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if v == 2 {
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return true
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}
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}
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return false
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}
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func hasThree(box string) bool {
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chars := make(map[rune]int)
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for _, c := range box {
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chars[c]++
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}
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for _, v := range chars {
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if v == 3 {
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return true
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}
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}
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return false
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}
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