From a330f6baa2a3a46e1e9277ef4da161cd594373e9 Mon Sep 17 00:00:00 2001
From: Stanislav Nikolov <hello@snikolov.me>
Date: Mon, 5 Dec 2022 10:03:39 +0200
Subject: [PATCH] WIP

---
 day1/day1.go      |    6 +-
 day1/day1_test.go |   12 -
 day2/day2.go      |  128 +++
 day2/prod.in.txt  | 2500 +++++++++++++++++++++++++++++++++++++++++++++
 day2/test.in.txt  |    3 +
 day3/day3.go      |   90 ++
 day3/prod.in.txt  |  300 ++++++
 day3/test.in.txt  |    6 +
 day4/day4.go      |   87 ++
 day4/prod.in.txt  | 1000 ++++++++++++++++++
 day4/test.in.txt  |    6 +
 day5/day4.go      |   19 +
 day5/prod.in.txt  |  512 ++++++++++
 day5/test.in.txt  |    9 +
 main.go           |   18 +-
 utils/set.go      |   31 +
 utils/set_test.go |   21 +
 utils/utils.go    |    4 +-
 18 files changed, 4731 insertions(+), 21 deletions(-)
 delete mode 100644 day1/day1_test.go
 create mode 100644 day2/day2.go
 create mode 100644 day2/prod.in.txt
 create mode 100644 day2/test.in.txt
 create mode 100644 day3/day3.go
 create mode 100644 day3/prod.in.txt
 create mode 100644 day3/test.in.txt
 create mode 100644 day4/day4.go
 create mode 100644 day4/prod.in.txt
 create mode 100644 day4/test.in.txt
 create mode 100644 day5/day4.go
 create mode 100644 day5/prod.in.txt
 create mode 100644 day5/test.in.txt
 create mode 100644 utils/set.go
 create mode 100644 utils/set_test.go

diff --git a/day1/day1.go b/day1/day1.go
index d59b694..fd5e436 100644
--- a/day1/day1.go
+++ b/day1/day1.go
@@ -1,4 +1,4 @@
-package day1_calorie_counting
+package day1
 
 import (
 	"sort"
@@ -27,7 +27,7 @@ func (s *Solver) ParseInput(input []string) {
 	s.elves = elves
 }
 
-func (s *Solver) SolvePart1() int {
+func (s *Solver) SolvePart1() any {
 	mostCalories := 0
 	for _, calories := range s.elves {
 		sum := 0
@@ -41,7 +41,7 @@ func (s *Solver) SolvePart1() int {
 	return mostCalories
 }
 
-func (s *Solver) SolvePart2() int {
+func (s *Solver) SolvePart2() any {
 	caloriesPerElf := make([]int, len(s.elves))
 	for i, calories := range s.elves {
 		sum := 0
diff --git a/day1/day1_test.go b/day1/day1_test.go
deleted file mode 100644
index b649091..0000000
--- a/day1/day1_test.go
+++ /dev/null
@@ -1,12 +0,0 @@
-package day1_calorie_counting
-
-import (
-	"snikolov.me/aoc2022/testutils"
-	"testing"
-)
-
-func TestCorrectSolutions(t *testing.T) {
-	solver := &Solver{}
-	testutils.TestHelper(t, solver, 1, true, 24000, 45000)
-	testutils.TestHelper(t, solver, 1, false, 66306, 195292)
-}
diff --git a/day2/day2.go b/day2/day2.go
new file mode 100644
index 0000000..795fd7e
--- /dev/null
+++ b/day2/day2.go
@@ -0,0 +1,128 @@
+package day2
+
+import (
+	"fmt"
+	"strings"
+)
+
+type Solver struct {
+	rounds []*Round
+}
+
+type ActionType int
+
+const (
+	Rock ActionType = iota
+	Paper
+	Scissors
+)
+
+func (a ActionType) Score() int {
+	m := map[ActionType]int{Rock: 1, Paper: 2, Scissors: 3}
+	return m[a]
+}
+
+func NewAction(s string) ActionType {
+	switch s {
+	case "A", "X":
+		return Rock
+	case "B", "Y":
+		return Paper
+	case "C", "Z":
+		return Scissors
+	}
+	panic(fmt.Sprintf("Unhandled action type: %s", s))
+}
+
+type Result int
+
+const (
+	Win Result = iota
+	Loss
+	Draw
+)
+
+func NewDesiredResult(s string) Result {
+	return map[string]Result{"X": Loss, "Y": Draw, "Z": Win}[s]
+}
+
+func (r Result) Score() int {
+	return map[Result]int{Win: 6, Draw: 3, Loss: 0}[r]
+}
+
+type Round struct {
+	OpponentAction, OwnAction ActionType
+	DesiredResult             Result
+}
+
+func (r Round) Score() int {
+	var result Result
+	switch {
+	case r.OwnAction == r.OpponentAction:
+		result = Draw
+	case r.OwnAction == Rock && r.OpponentAction == Scissors:
+		result = Win
+	case r.OwnAction == Paper && r.OpponentAction == Rock:
+		result = Win
+	case r.OwnAction == Scissors && r.OpponentAction == Paper:
+		result = Win
+	case r.OwnAction == Rock && r.OpponentAction == Paper:
+		result = Loss
+	case r.OwnAction == Paper && r.OpponentAction == Scissors:
+		result = Loss
+	case r.OwnAction == Scissors && r.OpponentAction == Rock:
+		result = Loss
+	}
+	return result.Score() + r.OwnAction.Score()
+}
+
+func (s *Solver) ParseInput(input []string) {
+	s.rounds = make([]*Round, len(input))
+
+	for i, line := range input {
+		split := strings.Split(line, " ")
+		s.rounds[i] = &Round{
+			OpponentAction: NewAction(split[0]),
+			OwnAction:      NewAction(split[1]),
+			DesiredResult:  NewDesiredResult(split[1]),
+		}
+	}
+}
+
+func (s *Solver) SolvePart1() any {
+	return s.score()
+}
+
+func (s *Solver) SolvePart2() any {
+	for _, r := range s.rounds {
+		switch {
+		case r.DesiredResult == Draw:
+			r.OwnAction = r.OpponentAction
+
+		case r.OpponentAction == Rock && r.DesiredResult == Win:
+			r.OwnAction = Paper
+		case r.OpponentAction == Rock && r.DesiredResult == Loss:
+			r.OwnAction = Scissors
+
+		case r.OpponentAction == Paper && r.DesiredResult == Win:
+			r.OwnAction = Scissors
+		case r.OpponentAction == Paper && r.DesiredResult == Loss:
+			r.OwnAction = Rock
+
+		case r.OpponentAction == Scissors && r.DesiredResult == Win:
+			r.OwnAction = Rock
+		case r.OpponentAction == Scissors && r.DesiredResult == Loss:
+			r.OwnAction = Paper
+		}
+	}
+
+	return s.score()
+}
+
+func (s *Solver) score() int {
+	score := 0
+	for _, s := range s.rounds {
+		score += s.Score()
+	}
+	return score
+}
diff --git a/day2/prod.in.txt b/day2/prod.in.txt
new file mode 100644
index 0000000..b9dd9f3
--- /dev/null
+++ b/day2/prod.in.txt
@@ -0,0 +1,2500 @@
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diff --git a/day2/test.in.txt b/day2/test.in.txt
new file mode 100644
index 0000000..db60e36
--- /dev/null
+++ b/day2/test.in.txt
@@ -0,0 +1,3 @@
+A Y
+B X
+C Z
diff --git a/day3/day3.go b/day3/day3.go
new file mode 100644
index 0000000..a696d97
--- /dev/null
+++ b/day3/day3.go
@@ -0,0 +1,90 @@
+package day3
+
+type Solver struct {
+	rucksacks []Rucksack
+
+	groups []ElfSet
+}
+
+type Rucksack struct {
+	compartment1, compartment2 []byte
+}
+
+type ElfSet struct {
+	elfItems [3]map[byte]bool
+}
+
+func (s *Solver) ParseInput(input []string) {
+	s.rucksacks = make([]Rucksack, len(input))
+
+	for i, line := range input {
+		s.rucksacks[i] = Rucksack{
+			compartment1: []byte(line[:len(line)/2]),
+			compartment2: []byte(line[len(line)/2:]),
+		}
+	}
+	// fmt.Printf("%v\n", s.rucksacks)
+
+	var elfSet ElfSet
+	for i, line := range input {
+		elfIndex := i % len(elfSet.elfItems)
+		if elfIndex == 0 {
+			elfSet = ElfSet{}
+		}
+		if elfSet.elfItems[elfIndex] == nil {
+			elfSet.elfItems[elfIndex] = make(map[byte]bool, 0)
+		}
+		for _, b := range []byte(line) {
+			elfSet.elfItems[elfIndex][b] = true
+		}
+		if i%3 == 2 {
+			s.groups = append(s.groups, elfSet)
+		}
+	}
+	// fmt.Printf("%+v\n", s.groups)
+}
+
+func (s *Solver) SolvePart1() any {
+	var total int
+
+	for _, r := range s.rucksacks {
+		m := make(map[byte]bool, 0)
+
+		for _, b := range r.compartment1 {
+			m[b] = true
+		}
+		for _, b := range r.compartment2 {
+			if _, ok := m[b]; ok {
+				total += getValue(b)
+				break
+			}
+		}
+	}
+
+	return total
+}
+func getValue(b byte) int {
+	if b >= 'a' && b <= 'z' {
+		return int(b - 'a' + 1)
+	} else {
+		return int(b - 'A' + 27)
+	}
+}
+
+func (s *Solver) SolvePart2() any {
+	var total int
+	for _, g := range s.groups {
+		for item := range g.elfItems[0] {
+			if _, ok := g.elfItems[1][item]; !ok {
+				continue
+			}
+			if _, ok := g.elfItems[2][item]; !ok {
+				continue
+			}
+			total += getValue(item)
+			// fmt.Println(string(item))
+			break
+		}
+	}
+	return total
+}
diff --git a/day3/prod.in.txt b/day3/prod.in.txt
new file mode 100644
index 0000000..35008ac
--- /dev/null
+++ b/day3/prod.in.txt
@@ -0,0 +1,300 @@
+rZTmmqbBrmBvSTCwDDtlwjqnqnnq
+dhgQHhPfVgPlPdFzFzFgdptCQjtnwCntjsCppRtRND
+lVdVHWGPvTvmrrBW
+GmJBqwPLhfPBfJfvfffFmwtjDprpzVpVMpcDrVjzzcjpML
+HgWnRnWggWbNTWbCnPCgCnsjcVDrjMrdzjprMMrzcHDrDr
+SsSsRsCSPSPBvtJt
+BLtwwTBmLSTlMsjdZmFZZP
+hzbzNNrbqQbhQDDrhCprbhDCpvFJJPjMZJZgjjPdlvZjZvvl
+fbNrqrVDfdfGzqcHTBTVHwcTSHcH
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diff --git a/day3/test.in.txt b/day3/test.in.txt
new file mode 100644
index 0000000..f17e726
--- /dev/null
+++ b/day3/test.in.txt
@@ -0,0 +1,6 @@
+vJrwpWtwJgWrhcsFMMfFFhFp
+jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
+PmmdzqPrVvPwwTWBwg
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+ttgJtRGJQctTZtZT
+CrZsJsPPZsGzwwsLwLmpwMDw
diff --git a/day4/day4.go b/day4/day4.go
new file mode 100644
index 0000000..edd233a
--- /dev/null
+++ b/day4/day4.go
@@ -0,0 +1,87 @@
+package day4
+
+import (
+	"strconv"
+	"strings"
+)
+
+type Solver struct {
+	elfPairs []ElfPair
+}
+
+type ElfPair struct {
+	first, second map[int]bool
+}
+
+func (s *Solver) ParseInput(input []string) {
+	s.elfPairs = make([]ElfPair, len(input))
+
+	for pairIndex, line := range input {
+		pairs := strings.Split(line, ",")
+
+		var i, j int
+
+		p1 := strings.Split(pairs[0], "-")
+		m1 := make(map[int]bool)
+
+		i, _ = strconv.Atoi(p1[0])
+		j, _ = strconv.Atoi(p1[1])
+		for ; i <= j; i++ {
+			m1[i] = true
+		}
+
+		p2 := strings.Split(pairs[1], "-")
+		m2 := make(map[int]bool)
+
+		i, _ = strconv.Atoi(p2[0])
+		j, _ = strconv.Atoi(p2[1])
+		for ; i <= j; i++ {
+			m2[i] = true
+		}
+
+		s.elfPairs[pairIndex] = ElfPair{m1, m2}
+	}
+}
+
+func (s *Solver) SolvePart1() any {
+	var total int
+
+	for _, ep := range s.elfPairs {
+		if contains(ep.first, ep.second) || contains(ep.second, ep.first) {
+			total += 1
+		}
+	}
+
+	return total
+}
+
+func (s *Solver) SolvePart2() any {
+	var total int
+
+	for _, ep := range s.elfPairs {
+		if len(intersect(ep.first, ep.second)) > 0 {
+			total += 1
+		}
+	}
+
+	return total
+}
+
+func contains(m1, m2 map[int]bool) bool {
+	for k := range m1 {
+		if _, ok := m2[k]; !ok {
+			return false
+		}
+	}
+	return true
+}
+
+func intersect(m1, m2 map[int]bool) []int {
+	result := make([]int, 0)
+	for k := range m1 {
+		if _, ok := m2[k]; ok {
+			result = append(result, k)
+		}
+	}
+	return result
+}
diff --git a/day4/prod.in.txt b/day4/prod.in.txt
new file mode 100644
index 0000000..12d430c
--- /dev/null
+++ b/day4/prod.in.txt
@@ -0,0 +1,1000 @@
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+43-47,26-34
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+35-36,35-97
+6-25,5-25
+4-65,2-5
+70-71,50-70
+9-95,4-9
+38-75,38-39
+72-94,8-71
+30-97,30-31
+8-87,8-40
+19-59,18-59
+3-96,1-96
+4-69,3-99
+4-7,7-98
+16-94,93-94
+8-86,9-87
+23-97,23-98
+5-89,6-6
+15-32,15-15
+8-79,2-8
+6-22,7-22
+89-91,24-90
+57-85,7-86
+54-79,53-54
+96-97,7-97
+45-45,9-44
+28-98,46-97
+40-65,66-66
+12-26,13-26
+10-10,10-76
+29-59,28-59
+17-39,16-72
+69-70,70-81
+60-61,60-64
+18-56,18-95
+21-21,21-80
+15-36,15-95
+1-98,1-1
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+42-81,65-82
+44-87,43-90
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+7-78,3-79
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+39-62,4-15
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+63-91,23-99
+12-93,11-19
+52-93,73-99
+12-95,12-12
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+83-85,12-84
+26-99,26-27
+58-62,57-88
+27-43,44-44
+43-96,20-44
+34-61,59-60
+44-75,43-75
+1-99,5-93
+17-99,18-98
+84-90,85-89
+5-49,1-5
+26-74,43-74
+65-93,65-90
+18-84,11-19
+15-15,14-83
+19-97,19-96
+2-95,4-95
+84-84,85-85
+7-53,53-56
+2-2,3-60
+24-48,48-72
+1-1,1-97
+15-29,16-20
+1-20,19-50
+6-88,1-7
+14-47,13-13
+4-44,4-42
+7-98,7-12
+30-69,3-30
+73-82,81-83
+1-96,1-86
+4-4,3-48
+94-96,5-86
+29-73,29-30
+21-22,22-80
+97-98,29-98
+42-75,76-84
+86-92,85-93
+14-70,13-69
diff --git a/day4/test.in.txt b/day4/test.in.txt
new file mode 100644
index 0000000..9f9e9cf
--- /dev/null
+++ b/day4/test.in.txt
@@ -0,0 +1,6 @@
+2-4,6-8
+2-3,4-5
+5-7,7-9
+2-8,3-7
+6-6,4-6
+2-6,4-8
diff --git a/day5/day4.go b/day5/day4.go
new file mode 100644
index 0000000..62423e3
--- /dev/null
+++ b/day5/day4.go
@@ -0,0 +1,19 @@
+package day5
+
+type Solver struct {
+}
+
+func (s *Solver) ParseInput(input []string) {
+}
+
+func (s *Solver) SolvePart1() any {
+	var total int
+
+	return total
+}
+
+func (s *Solver) SolvePart2() any {
+	var total int
+
+	return total
+}
diff --git a/day5/prod.in.txt b/day5/prod.in.txt
new file mode 100644
index 0000000..7227e79
--- /dev/null
+++ b/day5/prod.in.txt
@@ -0,0 +1,512 @@
+[S]                 [T] [Q]        
+[L]             [B] [M] [P]     [T]
+[F]     [S]     [Z] [N] [S]     [R]
+[Z] [R] [N]     [R] [D] [F]     [V]
+[D] [Z] [H] [J] [W] [G] [W]     [G]
+[B] [M] [C] [F] [H] [Z] [N] [R] [L]
+[R] [B] [L] [C] [G] [J] [L] [Z] [C]
+[H] [T] [Z] [S] [P] [V] [G] [M] [M]
+ 1   2   3   4   5   6   7   8   9 
+
+move 6 from 1 to 7
+move 2 from 2 to 4
+move 2 from 7 to 4
+move 6 from 4 to 3
+move 1 from 5 to 1
+move 3 from 8 to 3
+move 15 from 3 to 4
+move 6 from 5 to 9
+move 14 from 4 to 2
+move 3 from 2 to 7
+move 1 from 2 to 7
+move 9 from 9 to 1
+move 3 from 2 to 1
+move 7 from 6 to 7
+move 1 from 6 to 8
+move 2 from 9 to 1
+move 9 from 2 to 3
+move 8 from 3 to 9
+move 1 from 1 to 4
+move 1 from 8 to 6
+move 1 from 6 to 2
+move 5 from 9 to 8
+move 2 from 9 to 1
+move 1 from 4 to 2
+move 17 from 1 to 9
+move 1 from 3 to 1
+move 3 from 2 to 3
+move 2 from 4 to 5
+move 12 from 7 to 3
+move 16 from 9 to 2
+move 5 from 7 to 5
+move 2 from 1 to 2
+move 1 from 3 to 6
+move 1 from 4 to 6
+move 1 from 7 to 3
+move 1 from 6 to 3
+move 7 from 3 to 4
+move 5 from 8 to 3
+move 1 from 6 to 7
+move 7 from 3 to 4
+move 6 from 3 to 1
+move 2 from 4 to 8
+move 1 from 5 to 2
+move 10 from 4 to 5
+move 3 from 5 to 2
+move 2 from 8 to 9
+move 5 from 2 to 8
+move 1 from 3 to 5
+move 2 from 5 to 8
+move 12 from 5 to 7
+move 1 from 4 to 2
+move 5 from 9 to 4
+move 1 from 2 to 5
+move 6 from 1 to 3
+move 6 from 3 to 5
+move 10 from 7 to 4
+move 2 from 7 to 3
+move 4 from 7 to 6
+move 1 from 9 to 5
+move 12 from 2 to 1
+move 1 from 8 to 7
+move 3 from 7 to 4
+move 4 from 4 to 8
+move 7 from 5 to 3
+move 1 from 2 to 4
+move 10 from 1 to 5
+move 2 from 1 to 2
+move 4 from 6 to 7
+move 8 from 8 to 3
+move 5 from 4 to 9
+move 12 from 3 to 8
+move 4 from 3 to 8
+move 2 from 9 to 2
+move 3 from 5 to 4
+move 1 from 3 to 5
+move 1 from 7 to 6
+move 14 from 4 to 6
+move 6 from 5 to 9
+move 8 from 2 to 8
+move 3 from 5 to 7
+move 21 from 8 to 4
+move 16 from 4 to 9
+move 8 from 6 to 2
+move 4 from 6 to 1
+move 1 from 4 to 6
+move 2 from 4 to 8
+move 3 from 1 to 8
+move 2 from 4 to 6
+move 1 from 6 to 2
+move 3 from 8 to 4
+move 2 from 2 to 5
+move 2 from 5 to 7
+move 1 from 8 to 9
+move 1 from 4 to 9
+move 1 from 1 to 6
+move 3 from 6 to 3
+move 3 from 2 to 3
+move 1 from 4 to 6
+move 3 from 6 to 7
+move 10 from 9 to 7
+move 1 from 4 to 7
+move 6 from 8 to 3
+move 1 from 6 to 8
+move 2 from 2 to 5
+move 1 from 2 to 1
+move 1 from 8 to 9
+move 1 from 2 to 8
+move 1 from 1 to 9
+move 7 from 9 to 1
+move 1 from 8 to 5
+move 7 from 1 to 7
+move 3 from 5 to 8
+move 3 from 7 to 2
+move 1 from 8 to 4
+move 1 from 2 to 4
+move 2 from 4 to 6
+move 5 from 3 to 1
+move 9 from 7 to 2
+move 6 from 3 to 8
+move 8 from 2 to 7
+move 2 from 6 to 4
+move 2 from 1 to 7
+move 2 from 1 to 4
+move 24 from 7 to 4
+move 4 from 8 to 9
+move 2 from 7 to 5
+move 1 from 5 to 2
+move 1 from 3 to 8
+move 4 from 2 to 8
+move 13 from 9 to 2
+move 2 from 8 to 6
+move 3 from 9 to 6
+move 26 from 4 to 2
+move 1 from 5 to 7
+move 2 from 6 to 2
+move 2 from 4 to 1
+move 7 from 2 to 1
+move 15 from 2 to 6
+move 8 from 2 to 8
+move 4 from 6 to 8
+move 9 from 2 to 9
+move 13 from 6 to 7
+move 6 from 1 to 9
+move 2 from 2 to 4
+move 4 from 1 to 6
+move 3 from 8 to 3
+move 1 from 4 to 9
+move 2 from 6 to 7
+move 1 from 4 to 3
+move 3 from 3 to 2
+move 14 from 7 to 4
+move 5 from 9 to 5
+move 9 from 8 to 5
+move 7 from 9 to 6
+move 2 from 5 to 6
+move 2 from 9 to 2
+move 10 from 5 to 1
+move 1 from 3 to 1
+move 2 from 8 to 1
+move 1 from 9 to 2
+move 1 from 7 to 5
+move 4 from 2 to 1
+move 1 from 9 to 8
+move 3 from 4 to 1
+move 1 from 8 to 6
+move 12 from 1 to 5
+move 1 from 1 to 6
+move 1 from 7 to 5
+move 4 from 6 to 9
+move 2 from 2 to 4
+move 1 from 9 to 6
+move 1 from 1 to 5
+move 2 from 9 to 7
+move 10 from 6 to 5
+move 1 from 6 to 7
+move 20 from 5 to 1
+move 1 from 7 to 9
+move 2 from 9 to 1
+move 3 from 5 to 1
+move 2 from 8 to 4
+move 2 from 8 to 7
+move 1 from 5 to 9
+move 1 from 8 to 4
+move 22 from 1 to 7
+move 5 from 4 to 8
+move 1 from 5 to 9
+move 19 from 7 to 4
+move 2 from 9 to 1
+move 1 from 5 to 9
+move 10 from 1 to 8
+move 1 from 9 to 1
+move 1 from 8 to 3
+move 8 from 4 to 7
+move 1 from 5 to 6
+move 3 from 4 to 5
+move 1 from 5 to 9
+move 11 from 7 to 4
+move 4 from 4 to 9
+move 1 from 6 to 2
+move 1 from 3 to 9
+move 5 from 9 to 4
+move 5 from 7 to 9
+move 23 from 4 to 2
+move 17 from 2 to 7
+move 2 from 2 to 8
+move 4 from 4 to 7
+move 1 from 4 to 5
+move 2 from 5 to 2
+move 5 from 8 to 9
+move 5 from 2 to 7
+move 9 from 7 to 5
+move 11 from 9 to 2
+move 1 from 4 to 3
+move 5 from 8 to 7
+move 3 from 8 to 5
+move 2 from 1 to 3
+move 2 from 3 to 9
+move 1 from 5 to 8
+move 5 from 7 to 5
+move 15 from 5 to 4
+move 2 from 8 to 1
+move 2 from 5 to 1
+move 4 from 4 to 1
+move 1 from 8 to 7
+move 8 from 2 to 1
+move 4 from 2 to 8
+move 2 from 7 to 4
+move 5 from 8 to 6
+move 5 from 7 to 9
+move 4 from 6 to 5
+move 7 from 4 to 8
+move 1 from 6 to 1
+move 1 from 3 to 1
+move 2 from 5 to 1
+move 7 from 1 to 5
+move 5 from 1 to 3
+move 4 from 7 to 9
+move 4 from 3 to 9
+move 2 from 9 to 7
+move 6 from 9 to 2
+move 1 from 4 to 1
+move 1 from 3 to 5
+move 1 from 2 to 5
+move 5 from 9 to 4
+move 4 from 4 to 6
+move 1 from 8 to 9
+move 8 from 4 to 3
+move 7 from 7 to 3
+move 5 from 1 to 3
+move 11 from 5 to 9
+move 1 from 7 to 6
+move 2 from 3 to 5
+move 1 from 3 to 1
+move 3 from 6 to 2
+move 2 from 5 to 1
+move 2 from 1 to 2
+move 3 from 1 to 5
+move 5 from 9 to 2
+move 2 from 6 to 8
+move 2 from 3 to 8
+move 4 from 9 to 7
+move 3 from 5 to 2
+move 2 from 1 to 8
+move 1 from 9 to 8
+move 1 from 9 to 2
+move 4 from 7 to 9
+move 11 from 8 to 7
+move 1 from 8 to 2
+move 6 from 9 to 7
+move 3 from 7 to 1
+move 13 from 2 to 7
+move 24 from 7 to 1
+move 2 from 2 to 6
+move 1 from 8 to 3
+move 1 from 9 to 3
+move 5 from 2 to 4
+move 1 from 2 to 5
+move 1 from 6 to 2
+move 1 from 6 to 3
+move 1 from 2 to 4
+move 3 from 7 to 3
+move 2 from 1 to 7
+move 2 from 3 to 8
+move 2 from 7 to 8
+move 9 from 3 to 2
+move 3 from 4 to 8
+move 1 from 5 to 1
+move 9 from 2 to 1
+move 3 from 4 to 9
+move 1 from 7 to 8
+move 6 from 3 to 9
+move 2 from 1 to 5
+move 15 from 1 to 3
+move 13 from 3 to 9
+move 11 from 1 to 4
+move 5 from 4 to 1
+move 6 from 3 to 6
+move 4 from 4 to 8
+move 6 from 1 to 4
+move 1 from 5 to 2
+move 1 from 2 to 1
+move 3 from 4 to 2
+move 2 from 8 to 5
+move 2 from 4 to 2
+move 9 from 9 to 3
+move 9 from 3 to 5
+move 2 from 9 to 4
+move 5 from 2 to 6
+move 1 from 1 to 8
+move 1 from 4 to 1
+move 10 from 9 to 2
+move 9 from 2 to 4
+move 10 from 4 to 1
+move 3 from 1 to 3
+move 4 from 1 to 2
+move 5 from 2 to 4
+move 2 from 5 to 2
+move 4 from 1 to 7
+move 10 from 5 to 4
+move 2 from 2 to 4
+move 1 from 9 to 2
+move 2 from 3 to 5
+move 1 from 3 to 5
+move 3 from 6 to 7
+move 8 from 4 to 9
+move 6 from 6 to 1
+move 4 from 9 to 5
+move 2 from 9 to 1
+move 1 from 2 to 6
+move 6 from 5 to 2
+move 3 from 7 to 9
+move 4 from 8 to 2
+move 1 from 7 to 9
+move 1 from 5 to 3
+move 2 from 7 to 4
+move 1 from 7 to 1
+move 14 from 1 to 9
+move 1 from 1 to 9
+move 1 from 3 to 8
+move 3 from 2 to 5
+move 2 from 4 to 2
+move 6 from 8 to 1
+move 1 from 2 to 1
+move 5 from 1 to 9
+move 1 from 1 to 7
+move 2 from 8 to 5
+move 1 from 5 to 4
+move 1 from 6 to 1
+move 8 from 2 to 7
+move 2 from 6 to 1
+move 9 from 9 to 5
+move 11 from 4 to 8
+move 4 from 7 to 4
+move 6 from 4 to 6
+move 1 from 7 to 4
+move 6 from 6 to 7
+move 1 from 5 to 9
+move 6 from 8 to 9
+move 8 from 9 to 5
+move 1 from 4 to 5
+move 15 from 9 to 3
+move 3 from 1 to 4
+move 6 from 7 to 2
+move 3 from 4 to 9
+move 2 from 7 to 3
+move 1 from 7 to 3
+move 1 from 7 to 2
+move 2 from 8 to 1
+move 3 from 8 to 5
+move 2 from 1 to 7
+move 8 from 3 to 6
+move 3 from 6 to 5
+move 1 from 6 to 1
+move 10 from 5 to 7
+move 6 from 5 to 4
+move 4 from 2 to 4
+move 6 from 5 to 1
+move 6 from 1 to 8
+move 2 from 9 to 2
+move 2 from 9 to 7
+move 6 from 3 to 7
+move 1 from 3 to 5
+move 1 from 1 to 9
+move 2 from 8 to 1
+move 2 from 5 to 4
+move 3 from 3 to 7
+move 10 from 4 to 6
+move 1 from 9 to 7
+move 12 from 7 to 3
+move 12 from 3 to 8
+move 2 from 1 to 5
+move 1 from 1 to 3
+move 13 from 8 to 1
+move 7 from 7 to 1
+move 13 from 6 to 9
+move 1 from 7 to 4
+move 6 from 5 to 3
+move 3 from 4 to 3
+move 6 from 3 to 1
+move 10 from 9 to 4
+move 2 from 7 to 6
+move 8 from 1 to 9
+move 3 from 2 to 9
+move 1 from 3 to 5
+move 1 from 3 to 5
+move 1 from 1 to 4
+move 6 from 9 to 3
+move 2 from 6 to 7
+move 4 from 9 to 5
+move 4 from 1 to 6
+move 1 from 2 to 4
+move 6 from 1 to 4
+move 3 from 9 to 3
+move 3 from 6 to 8
+move 3 from 8 to 7
+move 5 from 5 to 1
+move 1 from 3 to 9
+move 1 from 9 to 5
+move 1 from 3 to 2
+move 2 from 5 to 1
+move 1 from 6 to 9
+move 1 from 6 to 3
+move 2 from 9 to 7
+move 2 from 8 to 1
+move 1 from 3 to 2
+move 1 from 2 to 5
+move 1 from 7 to 1
+move 7 from 7 to 9
+move 12 from 1 to 9
+move 1 from 5 to 2
+move 1 from 7 to 1
+move 13 from 4 to 7
+move 1 from 9 to 4
+move 5 from 7 to 3
+move 4 from 9 to 1
+move 8 from 7 to 9
+move 3 from 2 to 3
+move 4 from 3 to 7
+move 5 from 4 to 6
+move 3 from 9 to 4
+move 10 from 1 to 5
+move 3 from 4 to 7
+move 16 from 9 to 2
+move 3 from 9 to 2
+move 6 from 5 to 3
+move 4 from 6 to 2
+move 1 from 4 to 6
+move 2 from 6 to 8
+move 1 from 5 to 2
+move 1 from 5 to 8
+move 7 from 7 to 2
+move 16 from 2 to 1
+move 1 from 5 to 1
+move 10 from 2 to 8
+move 14 from 8 to 5
+move 2 from 2 to 6
+move 1 from 2 to 5
+move 2 from 2 to 1
+move 8 from 1 to 7
+move 4 from 1 to 7
+move 2 from 1 to 7
+move 5 from 3 to 2
+move 1 from 1 to 6
+move 2 from 2 to 5
+move 4 from 1 to 7
+move 1 from 2 to 8
+move 1 from 2 to 8
+move 3 from 6 to 7
+move 10 from 7 to 5
+move 1 from 2 to 8
+move 27 from 5 to 9
+move 1 from 5 to 6
+move 1 from 6 to 4
+move 1 from 4 to 3
+move 3 from 3 to 7
+move 4 from 3 to 6
+move 2 from 6 to 4
+move 3 from 8 to 1
+move 2 from 6 to 1
+move 12 from 7 to 8
+move 2 from 3 to 9
+move 1 from 9 to 2
+move 1 from 2 to 8
+move 2 from 1 to 2
+move 6 from 3 to 8
+move 1 from 7 to 4
+move 15 from 9 to 5
+move 7 from 9 to 4
+move 1 from 2 to 1
+move 16 from 8 to 2
+move 8 from 5 to 2
+move 24 from 2 to 9
+move 3 from 1 to 2
+move 24 from 9 to 1
+move 5 from 5 to 9
+move 3 from 4 to 1
+move 1 from 7 to 6
+move 1 from 6 to 3
+move 1 from 3 to 2
+move 3 from 2 to 3
+move 1 from 5 to 6
+move 1 from 2 to 7
diff --git a/day5/test.in.txt b/day5/test.in.txt
new file mode 100644
index 0000000..84933bb
--- /dev/null
+++ b/day5/test.in.txt
@@ -0,0 +1,9 @@
+    [D]    
+[N] [C]    
+[Z] [M] [P]
+ 1   2   3 
+
+move 1 from 2 to 1
+move 3 from 1 to 3
+move 2 from 2 to 1
+move 1 from 1 to 2
diff --git a/main.go b/main.go
index 746c652..708a12e 100644
--- a/main.go
+++ b/main.go
@@ -4,9 +4,15 @@ import (
 	"flag"
 	"fmt"
 	"log"
-	day1_calorie_counting "snikolov.me/aoc2022/day1"
-	"snikolov.me/aoc2022/utils"
 	"time"
+
+	"snikolov.me/aoc2022/day1"
+	"snikolov.me/aoc2022/day2"
+	"snikolov.me/aoc2022/day3"
+	"snikolov.me/aoc2022/day4"
+	"snikolov.me/aoc2022/day5"
+
+	"snikolov.me/aoc2022/utils"
 )
 
 type Args struct {
@@ -39,7 +45,11 @@ func main() {
 
 func solve(args Args, inputFileName string) {
 	solvers := map[int]utils.Solver{
-		1: &day1_calorie_counting.Solver{},
+		1: &day1.Solver{},
+		2: &day2.Solver{},
+		3: &day3.Solver{},
+		4: &day4.Solver{},
+		5: &day5.Solver{},
 	}
 	solver, ok := solvers[args.DayNumber]
 	if !ok {
@@ -54,7 +64,7 @@ func solve(args Args, inputFileName string) {
 		log.Fatalf("Could not read input for day %d: %s", args.DayNumber, err)
 	}
 
-	var solution int
+	var solution any
 	switch args.PartNumber {
 	case 1:
 		solution = solver.SolvePart1()
diff --git a/utils/set.go b/utils/set.go
new file mode 100644
index 0000000..f550e28
--- /dev/null
+++ b/utils/set.go
@@ -0,0 +1,31 @@
+package utils
+
+type Set[T comparable] interface {
+	Items() []T
+	// Union(set Set[T]) Set[T]
+	// Intersection(set Set[T]) Set[T]
+	// ContainsItem(item T) bool
+	// ContainsSubset(set Set[T]) bool
+}
+
+type set[T comparable] struct {
+	m map[T]bool
+}
+
+func (s *set[T]) Items() []T {
+	r := make([]T, len(s.m))
+	i := 0
+	for item, _ := range s.m {
+		r[i] = item
+		i += 1
+	}
+	return r
+}
+
+func NewSet[T comparable](items ...T) Set[T] {
+	m := make(map[T]bool, len(items))
+	for _, item := range items {
+		m[item] = true
+	}
+	return &set[T]{m}
+}
diff --git a/utils/set_test.go b/utils/set_test.go
new file mode 100644
index 0000000..d3d4148
--- /dev/null
+++ b/utils/set_test.go
@@ -0,0 +1,21 @@
+package utils
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestSetItems(t *testing.T) {
+	s := NewSet(1, 2, 3, 2, 2, 1)
+
+	if !reflect.DeepEqual(s.Items(), []int{1, 2, 3}) {
+		t.Error("new set does not contain initial items")
+	}
+
+	items := []string{"hello", "there", "world", "sta", "satasr", "aaaaa", "tawfptars"}
+	s1 := NewSet(items...)
+
+	if !reflect.DeepEqual(s1.Items(), items) {
+		t.Error("new set does not contain initial items")
+	}
+}
diff --git a/utils/utils.go b/utils/utils.go
index 76f2e85..a09b547 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -11,8 +11,8 @@ import (
 
 type Solver interface {
 	ParseInput(input []string)
-	SolvePart1() int
-	SolvePart2() int
+	SolvePart1() any
+	SolvePart2() any
 }
 
 func ReadInput(inputFileName string) ([]string, error) {