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28 lines
429 B
Go
28 lines
429 B
Go
package one
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import (
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"bytes"
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"slices"
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)
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func Solve(buf []byte) (int, error) {
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r := bytes.NewReader(buf)
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updates, orderings, err := parseLines(r)
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if err != nil {
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return 0, err
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}
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var sum int
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for _, update := range updates {
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beforeSort := slices.Clone(update.Pages)
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update.Sort(orderings)
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if slices.Compare(beforeSort, update.Pages) == 0 {
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sum += update.Pages[len(update.Pages)/2]
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}
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}
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return sum, nil
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}
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