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Merge pull request #2 from StevanFreeborn/stevanfreeborn/feat/solve-day-one-part-two

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feat: solve day one part two
This commit is contained in:
Stevan Freeborn
2025-12-02 08:42:03 -05:00
committed by GitHub
parent e7c180de4b e1bb9d8beb
commit 678b417191
6 changed files with 111 additions and 24 deletions
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README.md
+14 -14
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@@ -20,17 +20,17 @@ Each day's solution is contained in a separate package.
## Challenges ## Challenges
| Day | Problem | Solution | Notes | | Day | Problem | Solution | Notes |
|-----|-------------------------------------------------|-----------------------|----------------------------------------| |-----|-------------------------------------------------|-----------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 01 | [Problem](https://adventofcode.com/2025/day/1) | [Solution](./cmd/01/) | Part 1 seemed straight forward enough. | | 01 | [Problem](https://adventofcode.com/2025/day/1) | [Solution](./cmd/01/) | Part 1 seemed straight forward enough. Part 2 completely stumped me. The trickiest part was not counting zero's twice when you ended and then started from there. |
| 02 | [Problem](https://adventofcode.com/2025/day/2) | [Solution](./cmd/02/) | | | 02 | [Problem](https://adventofcode.com/2025/day/2) | [Solution](./cmd/02/) | |
| 03 | [Problem](https://adventofcode.com/2025/day/3) | [Solution](./cmd/03/) | | | 03 | [Problem](https://adventofcode.com/2025/day/3) | [Solution](./cmd/03/) | |
| 04 | [Problem](https://adventofcode.com/2025/day/4) | [Solution](./cmd/04/) | | | 04 | [Problem](https://adventofcode.com/2025/day/4) | [Solution](./cmd/04/) | |
| 05 | [Problem](https://adventofcode.com/2025/day/5) | [Solution](./cmd/05/) | | | 05 | [Problem](https://adventofcode.com/2025/day/5) | [Solution](./cmd/05/) | |
| 06 | [Problem](https://adventofcode.com/2025/day/6) | [Solution](./cmd/06/) | | | 06 | [Problem](https://adventofcode.com/2025/day/6) | [Solution](./cmd/06/) | |
| 07 | [Problem](https://adventofcode.com/2025/day/7) | [Solution](./cmd/07/) | | | 07 | [Problem](https://adventofcode.com/2025/day/7) | [Solution](./cmd/07/) | |
| 08 | [Problem](https://adventofcode.com/2025/day/8) | [Solution](./cmd/08/) | | | 08 | [Problem](https://adventofcode.com/2025/day/8) | [Solution](./cmd/08/) | |
| 09 | [Problem](https://adventofcode.com/2025/day/9) | [Solution](./cmd/09/) | | | 09 | [Problem](https://adventofcode.com/2025/day/9) | [Solution](./cmd/09/) | |
| 10 | [Problem](https://adventofcode.com/2025/day/10) | [Solution](./cmd/10/) | | | 10 | [Problem](https://adventofcode.com/2025/day/10) | [Solution](./cmd/10/) | |
| 11 | [Problem](https://adventofcode.com/2025/day/11) | [Solution](./cmd/11/) | | | 11 | [Problem](https://adventofcode.com/2025/day/11) | [Solution](./cmd/11/) | |
| 12 | [Problem](https://adventofcode.com/2025/day/12) | [Solution](./cmd/12/) | | | 12 | [Problem](https://adventofcode.com/2025/day/12) | [Solution](./cmd/12/) | |
cmd/01/dial/dial.go
+42 -8
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@@ -7,42 +7,76 @@ import (
) )
type Dial interface { type Dial interface {
ZeroCount() int
Value() int Value() int
Turn(instruction instruction.Instruction) Turn(instruction instruction.Instruction)
} }
type dial struct { type dial struct {
value int zeroCount int
value int
} }
func New() Dial { func New() Dial {
return &dial{ return &dial{
value: 50, zeroCount: 0,
value: 50,
} }
} }
func From(value int) Dial {
return &dial{
zeroCount: 0,
value: value,
}
}
func (d *dial) ZeroCount() int {
return d.zeroCount
}
func (d *dial) Value() int { func (d *dial) Value() int {
return d.value return d.value
} }
func (d *dial) Turn(instruction instruction.Instruction) { func (d *dial) Turn(instruction instruction.Instruction) {
if instruction.Direction() == direction.Left { if instruction.Direction() == direction.Left {
d.value -= instruction.Distance() for range instruction.Distance() {
d.decreaseOneClick()
for d.value < 0 { if d.value == 0 {
d.value += 100 d.zeroCount++
}
if d.value < 0 {
d.value += 100
}
} }
return return
} }
if instruction.Direction() == direction.Right { if instruction.Direction() == direction.Right {
d.value += instruction.Distance() for range instruction.Distance() {
d.increaseOneClick()
for d.value > 99 { if d.value >= 100 {
d.value -= 100 d.value -= 100
}
if d.value == 0 {
d.zeroCount++
}
} }
return return
} }
} }
func (d *dial) decreaseOneClick() {
d.value--
}
func (d *dial) increaseOneClick() {
d.value++
}
cmd/01/dial/dial_test.go
+19
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@@ -16,6 +16,25 @@ func TestNew(t *testing.T) {
} }
} }
func TestProblem(t *testing.T) {
instructions := []instruction.Instruction{
instruction.FromLine("R48"),
instruction.FromLine("L5"),
}
dial := dial.From(52)
for _, i := range instructions {
dial.Turn(i)
}
result := dial.ZeroCount()
if result != 1 {
t.Errorf("ya done fucked up. you wanted %d but got %d", 1, result)
}
}
type TurnTestCase struct { type TurnTestCase struct {
Instruction instruction.Instruction Instruction instruction.Instruction
ExpectedDialValue int ExpectedDialValue int
cmd/01/main.go
+16
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@@ -26,3 +26,19 @@ func SolvePartOne(filePath string) int {
return total return total
} }
func SolvePartTwo(filePath string) int {
lines := file.ReadLines(filePath)
dial := dial.New()
for _, line := range lines {
if line == "" {
continue
}
instruction := instruction.FromLine(line)
dial.Turn(instruction)
}
return dial.ZeroCount()
}
cmd/01/main_test.go
+20
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@@ -25,3 +25,23 @@ func TestSolvePartOneWithInput(t *testing.T) {
t.Errorf(`SolvePartOne("INPUT.txt") = %d; want %d`, result, expected) t.Errorf(`SolvePartOne("INPUT.txt") = %d; want %d`, result, expected)
} }
} }
func TestSolvePartTwoWithExampleInput(t *testing.T) {
expected := 6
result := solution.SolvePartTwo("EXAMPLE.txt")
if result != expected {
t.Errorf(`SolvePartTwo("EXAMPLE.txt") = %d; want %d`, result, expected)
}
}
func TestSolvePartTwoWithInput(t *testing.T) {
expected := 5937
result := solution.SolvePartTwo("INPUT.txt")
if result != expected {
t.Errorf(`SolvePartTwo("INPUT.txt") = %d; want %d`, result, expected)
}
}
internal/file/file.go
-2
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@@ -3,7 +3,6 @@ package file
import ( import (
"bufio" "bufio"
"fmt"
"os" "os"
) )
@@ -20,7 +19,6 @@ func ReadLines(filePath string) []string {
for hasLine := scanner.Scan(); hasLine; hasLine = scanner.Scan() { for hasLine := scanner.Scan(); hasLine; hasLine = scanner.Scan() {
line := scanner.Text() line := scanner.Text()
fmt.Println(line)
lines = append(lines, line) lines = append(lines, line)
} }