chore: add hackerrank solutions

README.md.sig

@@ -0,0 +1,6 @@
+-----BEGIN SSH SIGNATURE-----
+U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgZ+OuJYdd3UiUbyBuO1RlsQR20a
+Qm5mKneuMxRjGo3zkAAAAEZmlsZQAAAAAAAAAGc2hhNTEyAAAAUwAAAAtzc2gtZWQyNTUx
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+acrdDxmq2S+oysQbK+pMUE
+-----END SSH SIGNATURE-----

aoc2023/day21/example.txt

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+...........
+.....###.#.
+.###.##..#.
+..#.#...#..
+....#.#....
+.##..S####.
+.##..#...#.
+.......##..
+.##.#.####.
+.##..##.##.
+...........

aoc2023/day21/input.txt

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+...................................................................................................................................

aoc2023/day21/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"bufio"
+	_ "embed"
+	"fmt"
+
+	aoc "go.sour.is/advent-of-code"
+)
+
+// var log = aoc.Log
+
+func main() { aoc.MustResult(aoc.Runner(run)) }
+
+type result struct {
+	valuePT1 int
+	valuePT2 int
+}
+
+func (r result) String() string { return fmt.Sprintf("%#v", r) }
+
+func run(scan *bufio.Scanner) (*result, error) {
+
+	for scan.Scan() {
+		_ = scan.Text()
+
+	}
+
+	return &result{}, nil
+}

aoc2023/day21/main_test.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"testing"
+
+	_ "embed"
+
+	"github.com/matryer/is"
+)
+
+//go:embed example.txt
+var example []byte
+
+//go:embed input.txt
+var input []byte
+
+func TestExample(t *testing.T) {
+	is := is.New(t)
+	scan := bufio.NewScanner(bytes.NewReader(example))
+
+	result, err := run(scan)
+	is.NoErr(err)
+
+	t.Log(result)
+	is.Equal(result.valuePT1, 0)
+	is.Equal(result.valuePT2, 0)
+}
+
+func TestSolution(t *testing.T) {
+	is := is.New(t)
+	scan := bufio.NewScanner(bytes.NewReader(input))
+
+	result, err := run(scan)
+	is.NoErr(err)
+
+	t.Log(result)
+	is.Equal(result.valuePT1, 0)
+	is.Equal(result.valuePT2, 0)
+}

aoc2024/day01/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"bufio"
+	_ "embed"
+	"fmt"
+
+	aoc "go.sour.is/advent-of-code"
+)
+
+// var log = aoc.Log
+
+func main() { aoc.MustResult(aoc.Runner(run)) }
+
+type result struct {
+	valuePT1 int
+	valuePT2 int
+}
+
+func (r result) String() string { return fmt.Sprintf("%#v", r) }
+
+func run(scan *bufio.Scanner) (*result, error) {
+
+	for scan.Scan() {
+		_ = scan.Text()
+
+	}
+
+	return &result{}, nil
+}

aoc2024/day01/main_test.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"testing"
+
+	_ "embed"
+
+	"github.com/matryer/is"
+)
+
+//go:embed example.txt
+var example []byte
+
+//go:embed input.txt
+var input []byte
+
+func TestExample(t *testing.T) {
+	is := is.New(t)
+	scan := bufio.NewScanner(bytes.NewReader(example))
+
+	result, err := run(scan)
+	is.NoErr(err)
+
+	t.Log(result)
+	is.Equal(result.valuePT1, 0)
+	is.Equal(result.valuePT2, 0)
+}
+
+func TestSolution(t *testing.T) {
+	is := is.New(t)
+	scan := bufio.NewScanner(bytes.NewReader(input))
+
+	result, err := run(scan)
+	is.NoErr(err)
+
+	t.Log(result)
+	is.Equal(result.valuePT1, 0)
+	is.Equal(result.valuePT2, 0)
+}

day23/example.txt

@@ -1,23 +0,0 @@
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-###.....#.>.>.###.#.###
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-###.###.#.###v#####v###
-#...#...#.#.>.>.#.>.###
-#.###.###.#.###.#.#v###
-#.....###...###...#...#
-#####################.#

day23/input.txt

@@ -1,141 +0,0 @@
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day23/main.go

@@ -1,236 +0,0 @@
-package main
-
-import (
-	"bufio"
-	_ "embed"
-	"fmt"
-	"strings"
-
-	aoc "go.sour.is/advent-of-code"
-)
-
-var log = aoc.Log
-
-func main() { aoc.MustResult(aoc.Runner(run)) }
-
-type result struct {
-	valuePT1 int
-	valuePT2 int
-}
-
-func (r result) String() string { return fmt.Sprintf("%#v", r) }
-
-func run(scan *bufio.Scanner) (*result, error) {
-	var m aoc.Map[int16, rune]
-
-	start := Point{0, 0}
-	target := Point{0, 0}
-	var text string
-	for scan.Scan() {
-		text = scan.Text()
-		if start == target {
-			start[1] = int16(strings.IndexRune(text, '.'))
-		}
-		m = append(m, []rune(text))
-	}
-	target[0] = int16(len(m) - 1)
-	target[1] = int16(strings.IndexRune(text, '.'))
-
-	result := &result{}
-
-	result.valuePT1 = search(&graph{m: m, start: start, target: target, neighbors: part1nbs})
-	result.valuePT2 = search(&graph{m: m, start: start, target: target, neighbors: part2nbs})
-
-	return result, nil
-}
-
-type Point = aoc.Point[int16]
-type Map = aoc.Map[int16, rune]
-
-// diretion of path steps
-type direction int8
-
-var (
-	U = Point{-1, 0}
-	R = Point{0, 1}
-	D = Point{1, 0}
-	L = Point{0, -1}
-)
-
-var directions = []Point{U, R, D, L}
-
-var dirIDX = func() map[Point]direction {
-	m := make(map[Point]direction, len(directions))
-	for k, v := range directions {
-		m[v] = direction(k)
-	}
-	return m
-}()
-
-var arrows = []rune{'^', '>', 'v', '<'}
-
-var arrowIDX = func() map[rune]Point {
-	m := make(map[rune]Point, len(arrows))
-	for k, v := range arrows {
-		m[v] = directions[k]
-	}
-	return m
-}()
-
-// position on the map
-type position struct {
-	loc       Point
-	direction Point
-}
-
-func (p position) step(to Point) position {
-	return position{p.loc.Add(to), to}
-}
-
-// implements FindPath graph interface
-type graph struct {
-	m      Map
-	start  Point
-	target Point
-
-	neighbors func(g *graph, current position) []position
-}
-
-// Neighbors returns valid steps from given position. if at target returns none.
-func (g *graph) Neighbors(current position) []position {
-	return g.neighbors(g, current)
-}
-
-// Cost calculates heat cost to neighbor from map
-func (g *graph) Cost(a, b position) int16 {
-	return 1
-}
-
-func (g *graph) Target(a position, c int16) bool {
-	return a.loc == g.target
-}
-
-func (g *graph) Seen(a position) position {
-	a.direction = Point{}
-	return a
-}
-
-func match[T comparable](match T, lis ...T) bool {
-	for _, b := range lis {
-		if b == match {
-			return true
-		}
-	}
-
-	return false
-}
-
-func search(g *graph) int {
-	costs, paths := aoc.FindPaths[int16, position](g, position{loc: g.start}, position{loc: g.target})
-
-	for i, path := range paths {
-		log("path length = ", costs[i])
-		printGraph(g.m, path)
-	}
-
-	return int(aoc.Max(0, costs...))
-}
-
-// printGraph with the path overlay
-func printGraph(m Map, path []position) {
-	pts := make(map[Point]position, len(path))
-	for _, pt := range path {
-		pts[pt.loc] = pt
-	}
-
-	for r, row := range m {
-		for c, x := range row {
-			if _, ok := pts[Point{int16(r), int16(c)}]; ok {
-				if x == '.' {
-					fmt.Print("*")
-				} else {
-					fmt.Print(string(x))
-				}
-				continue
-			}
-			fmt.Print(".")
-			_ = x
-			// fmt.Print(string(x))
-		}
-		fmt.Println("")
-	}
-	fmt.Println("")
-}
-
-func opposite(d Point) Point {
-	return directions[(dirIDX[d]+2)%4]
-}
-
-
-func part1nbs(g *graph, current position) []position {
-	var nbs []position
-
-	if current.loc == g.start {
-		return []position{
-			{current.loc.Add(D), D},
-		}
-	}
-
-	if current.loc == g.target {
-		return nil
-	}
-
-	// only one direction on arrow.
-	_, r, _ := g.m.Get(current.loc)
-	if match(r, arrows...) {
-		to := arrowIDX[r]
-		if next := current.step(to); g.m.Valid(next.loc) {
-			_, r, _ := g.m.Get(next.loc)
-			d := arrows[(dirIDX[to]+2)%4] // flow from opposite direction
-			if !match(r, rune(d), '#') {
-				nbs = append(nbs, next)
-			}
-		}
-		return nbs
-	}
-
-	for _, to := range directions {
-		if next := current.step(to); g.m.Valid(next.loc) {
-			_, r, _ := g.m.Get(next.loc)
-			d := arrows[(dirIDX[to]+2)%4] // flow from opposite direction
-			if !match(r, rune(d), '#') {
-				nbs = append(nbs, next)
-			}
-		}
-	}
-	return nbs
-}
-
-func part2nbs(g *graph, current position) []position {
-	var nbs []position
-
-	if current.loc == g.start {
-		return []position{
-			{current.loc.Add(D), D},
-		}
-	}
-
-	if current.loc == g.target {
-		return nil
-	}
-
-	for _, to := range directions {
-		if next := current.step(to); g.m.Valid(next.loc) {
-			if next.direction == opposite(current.direction) {
-				continue
-			}
-			_, r, _ := g.m.Get(next.loc)
-			if r == '#' {
-				continue
-			}
-
-			nbs = append(nbs, next)
-		}
-	}
-	return nbs
-}

day23/main_test.go

@@ -1,42 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"bytes"
-	"testing"
-
-	_ "embed"
-
-	"github.com/matryer/is"
-)
-
-//go:embed example.txt
-var example []byte
-
-//go:embed input.txt
-var input []byte
-
-func TestExample(t *testing.T) {
-	is := is.New(t)
-	scan := bufio.NewScanner(bytes.NewReader(example))
-
-	result, err := run(scan)
-	is.NoErr(err)
-
-	t.Log(result)
-	// is.Equal(result.valuePT1, 94)
-	is.Equal(result.valuePT2, 154)
-}
-
-// func TestSolution(t *testing.T) {
-// 	is := is.New(t)
-// 	scan := bufio.NewScanner(bytes.NewReader(input))
-
-// 	result, err := run(scan)
-// 	is.NoErr(err)
-
-// 	t.Log(result)
-// 	is.True(result.valuePT1 > 1918)
-// 	is.Equal(result.valuePT1, 2074)
-// 	is.Equal(result.valuePT2, 0)
-// }