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@@ -36,35 +36,35 @@ func readInput(file *os.File) [][]int {
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return reports
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}
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-func safe(report []int) (bool, int) {
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+func safe(report []int) int {
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var direction int
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edge := len(report)
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for i := 1; i < edge; i++ {
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delta := report[i] - report[i-1]
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if delta == 0 || delta < -3 || delta > 3 {
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- return false, i
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+ return i
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}
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if direction == 0 {
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direction = delta
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} else if direction < 0 && delta > 0 || direction > 0 && delta < 0 {
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- return false, i
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+ return i
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}
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}
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- return true, 0
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+ return 0
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}
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func checkReports(reports [][]int) (int, int) {
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var part1, part2 int
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for _, report := range reports {
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- status, failed := safe(report)
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- if status {
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+ bad := safe(report)
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+ if bad == 0 {
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part1++
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} else {
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- status, failed = safe(append(report[:failed], report[failed+1:]...))
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- if status {
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+ bad = safe(append(report[:bad], report[bad+1:]...))
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+ if bad == 0 {
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part2++
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}
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}
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