1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283 |
- package main
- import (
- "bufio"
- "fmt"
- "log"
- "os"
- )
- func readInput(file *os.File) []int {
- scanner := bufio.NewScanner(file)
- var numbers []int
- for scanner.Scan() {
- line := scanner.Text()
- if line == "" {
- continue
- }
- var current int
- n, err := fmt.Sscanf(line, "%d", ¤t)
- if n != 1 || err != nil {
- log.Fatal("Can't parse:", line, err)
- }
- numbers = append(numbers, current)
- }
- return numbers
- }
- func indexOf(numbers []int, number int) int {
- for i := range numbers {
- if numbers[i] == number {
- return i
- }
- }
- return -1
- }
- func establishNewIndex(size int, current int, value int) int {
- delta := current + value
- if delta < 0 {
- delta = 0 - delta
- rest := delta % size
- return size - 1 - rest
- }
- return delta % size
- }
- func mix(numbers []int) []int {
- size := len(numbers)
- mixed := make([]int, size)
- copy(mixed, numbers)
- for i := range numbers {
- currentIndex := indexOf(mixed, numbers[i])
- newIndex := establishNewIndex(size, i, numbers[i])
- fmt.Println(currentIndex, newIndex, numbers[i])
- }
- return mixed
- }
- func main() {
- if len(os.Args) < 2 {
- log.Fatal("You need to specify a file!")
- }
- filePath := os.Args[1]
- file, err := os.Open(filePath)
- if err != nil {
- log.Fatalf("Failed to open %s!\n", filePath)
- }
- numbers := readInput(file)
- fmt.Println(mix(numbers))
- }
|