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- package main
- import (
- "bufio"
- "fmt"
- "log"
- "os"
- "strconv"
- )
- func readFile(file *os.File) []int {
- var keys []int
- scanner := bufio.NewScanner(file)
- for scanner.Scan() {
- line := scanner.Text()
- if line == "" {
- break
- }
- key, err := strconv.Atoi(string(line))
- if err != nil {
- log.Fatalf("Error processing key for %s: %s", line, err)
- }
- keys = append(keys, key)
- }
- if err := scanner.Err(); err != nil {
- log.Fatalf("Scanner error: %s", err)
- }
- return keys
- }
- func establishLoopSize(key int) int {
- iterations := 0
- value := 1
- for value != key {
- value *= 7
- value %= 20201227
- iterations++
- }
- return iterations
- }
- 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)
- }
- keys := readFile(file)
- if err := file.Close(); err != nil {
- log.Fatalf("Failed to close file: %s", err)
- }
- key1LoopSize := establishLoopSize(keys[0])
- key2LoopSize := establishLoopSize(keys[1])
- fmt.Println(key1LoopSize, key2LoopSize)
- }
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