59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
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package main
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import (
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"fmt"
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"os"
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"strings"
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"strconv"
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)
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func check(e error) {
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if e != nil {
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panic(e)
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}
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}
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func main() {
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// read in file as lines
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dat, err := os.ReadFile("data.txt")
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check(err)
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lines := strings.Split(string(dat), "\n")
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// valid reports
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valid := 0
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for i := range len(lines) - 1 {
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str_levels := strings.Split(lines[i], " ")
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// convert to integer
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levels := make([]int, len(str_levels))
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for j := range str_levels {
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levels[j], err = strconv.Atoi(str_levels[j])
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check(err)
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}
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// check for validity
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if levels[0] > levels[1] {
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// decreasing sequence
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valid += 1
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for j := range len(levels) - 1 {
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if levels[j] - levels[j+1] <= 0 || levels[j] - levels[j+1] > 3 {
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valid -= 1
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break
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}
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}
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} else if levels[0] < levels[1] {
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// increasing sequence
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valid += 1
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for j := range len(levels) - 1 {
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if levels[j+1] - levels[j] <= 0 || levels[j+1] - levels[j] > 3 {
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valid -= 1
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break
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}
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}
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}
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}
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fmt.Println(valid)
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}
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