package main

import (
  "bufio"
  "fmt"
  "os"
  "aoc2022/day03/common"
)

func main() {
  rucksacks := common.Parse(*bufio.NewScanner(os.Stdin))
  sum := 0

  for i := 0; i < len(rucksacks); i+=3 {
    rucksack := rucksacks[i]
    commonItems := append(rucksack.GetCompartment(1).GetItems(), rucksack.GetCompartment(2).GetItems()...)
    for j := 1; j <= 2; j++ {
      for k := 0; k < len(commonItems); k++ {
        item := commonItems[k]
        if !rucksacks[i+j].GetCompartment(1).ContainsItem(item) && !rucksacks[i+j].GetCompartment(2).ContainsItem(item) {
          commonItems = append(commonItems[:k], commonItems[k+1:]...)
          k--
        }
      }
    }
    sum += commonItems[0]
  }

  fmt.Println(sum)
}