package main

import (
  "bufio"
  "fmt"
  "os"
  "aoc2022/day05/common"
)

func main() {
  stacks, movements := common.Parse(*bufio.NewScanner(os.Stdin))

  for _, movement := range(movements) {
    topStack := common.Stack{}
    for i := 0; i < movement.GetN(); i++ {
      top, _ := stacks[movement.GetStart() - 1].Pop()
      topStack.Push(top)
    }
    for top, left := topStack.Pop(); left; top, left = topStack.Pop() {
      stacks[movement.GetEnd() - 1].Push(top)
    }
  }

  for _, stack := range(stacks) {
    fmt.Print(string(stack.Peek()))
  }
  fmt.Println()
}