78 lines
1.5 KiB
Go
78 lines
1.5 KiB
Go
package main
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import (
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"fmt"
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"io/ioutil"
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"strconv"
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"strings"
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)
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type sRow struct {
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min, max int
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char, password string
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}
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func parse(data []byte) []sRow {
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parsed := []sRow{}
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for _, row := range strings.Split(strings.TrimSpace(string(data)), "\n") {
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s0 := strings.Split(row, ":")
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rule := strings.TrimSpace(s0[0])
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password := strings.TrimSpace(s0[1])
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s1 := strings.Split(rule, " ")
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minMax := strings.TrimSpace(s1[0])
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char := strings.TrimSpace(s1[1])
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s2 := strings.Split(minMax, "-")
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min, _ := strconv.Atoi(strings.TrimSpace(s2[0]))
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max, _ := strconv.Atoi(strings.TrimSpace(s2[1]))
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r := sRow{
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min: min,
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max: max,
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char: char,
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password: password,
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}
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parsed = append(parsed, r)
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}
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return parsed
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}
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func validSimple(rows []sRow) int {
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valid := 0
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for _, row := range rows {
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count := strings.Count(row.password, row.char)
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if row.min <= count && count <= row.max {
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valid++
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}
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}
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return valid
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}
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func validComplex(rows []sRow) int {
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valid := 0
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for _, row := range rows {
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l := len(row.password)
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min := row.min - 1
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max := row.max - 1
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if min >= l || max >= l {
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continue
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}
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r := []rune(row.password)
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a := string(r[min]) == row.char
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b := string(r[max]) == row.char
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if a != b {
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valid++
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}
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}
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return valid
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}
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func main() {
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data, _ := ioutil.ReadFile("./solutions/2/data.txt")
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rows := parse(data)
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simple := validSimple(rows)
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fmt.Println(simple)
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complex := validComplex(rows)
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fmt.Println(complex)
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}
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