77 lines
1.1 KiB
Go
77 lines
1.1 KiB
Go
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package main
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import (
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"bufio"
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"fmt"
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"os"
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"strconv"
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"strings"
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)
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const (
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//SZ = 5
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SZ = 256
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)
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var (
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list [SZ]int
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lengths []int
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pos int
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skip int
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)
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func main() {
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lengths = parseLengths()
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//fmt.Println(lengths)
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for i, _ := range list {
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list[i] = i
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}
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for _, l := range lengths {
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//fmt.Println(list, pos, skip, l)
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reverse(l)
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pos = (pos + l + skip) % SZ
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skip++
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}
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//fmt.Println(list)
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fmt.Println("Result:", list[0]*list[1])
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}
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func reverse(l int) {
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if l < 2 {
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return
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}
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rev := make([]int, l, l)
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to := (pos + l) % SZ
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if to > pos {
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for i, n := range list[pos:to] {
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rev[l-i-1] = n
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}
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} else {
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var i, j, n int
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for i, n = range list[pos:SZ] {
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rev[l-i-1] = n
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}
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//fmt.Println(" ", rev)
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for j, n = range list[0:to] {
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rev[l-j-i-2] = n
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}
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}
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//fmt.Println(" ", rev)
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for i, n := range rev {
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list[(pos+i)%SZ] = n
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}
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}
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func parseLengths() []int {
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l := make([]int, 0, 16)
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sc := bufio.NewScanner(os.Stdin)
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sc.Scan()
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for _, num := range strings.Split(sc.Text(), ",") {
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n, _ := strconv.Atoi(num)
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l = append(l, n)
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}
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return l
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}
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