65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
package main
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import (
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"fmt"
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"strconv"
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"strings"
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)
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const input = "-6,-3--1,3-5,7-11,14,15,17-20"
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func main() {
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fmt.Println("range:", input)
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var r []int
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var last int
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for _, part := range strings.Split(input, ",") {
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if i := strings.Index(part[1:], "-"); i == -1 {
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n, err := strconv.Atoi(part)
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if err != nil {
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fmt.Println(err)
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return
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}
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if len(r) > 0 {
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if last == n {
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fmt.Println("duplicate value:", n)
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return
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} else if last > n {
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fmt.Println("values not ordered:", last, ">", n)
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return
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}
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}
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r = append(r, n)
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last = n
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} else {
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n1, err := strconv.Atoi(part[:i+1])
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if err != nil {
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fmt.Println(err)
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return
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}
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n2, err := strconv.Atoi(part[i+2:])
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if err != nil {
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fmt.Println(err)
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return
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}
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if n2 < n1+2 {
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fmt.Println("invalid range:", part)
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return
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}
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if len(r) > 0 {
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if last == n1 {
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fmt.Println("duplicate value:", n1)
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return
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} else if last > n1 {
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fmt.Println("values not ordered:", last, ">", n1)
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return
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}
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}
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for i = n1; i <= n2; i++ {
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r = append(r, i)
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}
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last = n2
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}
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}
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fmt.Println("expanded:", r)
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}
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