44 lines
693 B
Go
44 lines
693 B
Go
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package main
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import (
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"bufio"
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"bytes"
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"fmt"
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"io/ioutil"
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"log"
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)
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func main() {
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f, err := ioutil.ReadFile("input")
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if err != nil {
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panic(err)
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}
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reader := bufio.NewReader(bytes.NewReader(f))
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var valid int
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for {
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line, err := reader.ReadString('\n')
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if err != nil {
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break
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}
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var pw string
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var min, max int
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var char rune
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n, err := fmt.Sscanf(line, "%d-%d %c: %s", &min, &max, &char, &pw)
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if err != nil {
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panic(err)
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}
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if n != 4 {
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panic("mismatched Scanf")
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}
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min--
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max--
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has1 := rune(pw[min]) == char
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has2 := rune(pw[max]) == char
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if has1 == has2 { // both false or both true
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continue
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}
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valid++
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}
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log.Printf("%d valid entries", valid)
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}
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