27 lines
376 B
Go
27 lines
376 B
Go
package main
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import (
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"bufio"
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"fmt"
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"os"
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"aoc2022/day06/common"
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)
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func main() {
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signal := common.Parse(*bufio.NewScanner(os.Stdin))
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index := 0
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for i := 4; i <= len(signal); i++ {
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set := make(map[rune]bool)
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for _, c := range signal[i-4:i] {
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set[c] = true
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}
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if len(set) == 4 {
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index = i
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break
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}
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}
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fmt.Println(index)
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}
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