Code for day 3, 4 in golang
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57
go/4/main.go
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57
go/4/main.go
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package main
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import (
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"bufio"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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)
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var (
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f = "../../4.input.txt"
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)
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func must(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 conv(s string) int {
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i, err := strconv.Atoi(s)
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must(err)
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return i
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}
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func main() {
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fp, err := filepath.Abs(f)
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must(err)
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rf, err := os.Open(fp)
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must(err)
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s := bufio.NewScanner(rf)
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s.Split(bufio.ScanLines)
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split := strings.Split
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containCount := 0
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overlapCount := 0
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for s.Scan() {
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l := s.Text()
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p := split(l, ",")
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ids1 := split(p[0], "-")
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ids2 := split(p[1], "-")
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id1 := []int{conv(ids1[0]), conv(ids1[1])}
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id2 := []int{conv(ids2[0]), conv(ids2[1])}
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if id1[0] <= id2 [0] && id1[1] >= id2[1] ||
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id1[0] >= id2 [0] && id1[1] <= id2[1] {
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containCount = containCount + 1
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}
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if id1[0] <= id2[1] && id1[1] >= id2[0] {
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overlapCount = overlapCount + 1
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}
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}
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println("contains count:", containCount)
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println("overlaps count:", overlapCount)
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}
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