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This commit is contained in:
Alan R Evans
2025-12-02 16:41:31 +00:00
parent 015607cde3
commit c82f1c5b30
1 changed files with 43 additions and 71 deletions
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114
2025/go/day01/day01.go
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@@ -20,46 +20,45 @@ type Instruction struct {
Steps int Steps int
} }
func Part1(input string) int { func parseInput(input string) []Instruction {
lines := strings.Split(input, "\n")
position := 50
code := 0
Instructions := make([]Instruction, 0) Instructions := make([]Instruction, 0)
lines := strings.Split(input, "\n")
for _, line := range lines { for _, line := range lines {
var steps int var steps int
var dir Dir var dir Dir
steps = utils.MustAtoi(line[1:])
switch line[0] { switch line[0] {
case 'L': case 'L':
steps = utils.MustAtoi(line[1:])
dir = Left dir = Left
case 'R': case 'R':
steps = utils.MustAtoi(line[1:])
dir = Right dir = Right
default: default:
fmt.Println("Invalid direction") fmt.Println("Invalid direction")
continue continue
} }
if steps > 100 {
steps = steps % 100
}
Instructions = append(Instructions, Instruction{Turn: dir, Steps: steps}) Instructions = append(Instructions, Instruction{Turn: dir, Steps: steps})
} }
fmt.Print(Instructions) return Instructions
}
func Part1(input string) int {
Instructions := parseInput(input)
position := 50
code := 0
for _, instr := range Instructions { for _, instr := range Instructions {
if instr.Turn == Left { switch instr.Turn {
if position-instr.Steps < 0 { case Left:
position = 100 + (position - instr.Steps) position -= instr.Steps % 100
} else { case Right:
position -= instr.Steps position += instr.Steps % 100
} }
} else if instr.Turn == Right { if position < 0 {
if position+instr.Steps >= 100 { position += 100
position = (position + instr.Steps) - 100 } else if position > 99 {
} else { position -= 100
position += instr.Steps
}
} }
fmt.Println("\n", instr.Turn, instr.Steps, "->", position)
if position == 0 { if position == 0 {
code++ code++
} }
@@ -68,61 +67,34 @@ func Part1(input string) int {
} }
func Part2(input string) int { func Part2(input string) int {
lines := strings.Split(input, "\n") Instructions := parseInput(input)
position := 50 position := 50
code := 0 code := 0
Instructions := make([]Instruction, 0) new_position := position
for _, line := range lines {
var steps int
var dir Dir
switch line[0] {
case 'L':
steps = utils.MustAtoi(line[1:])
dir = Left
case 'R':
steps = utils.MustAtoi(line[1:])
dir = Right
default:
fmt.Println("Invalid direction")
continue
}
Instructions = append(Instructions, Instruction{Turn: dir, Steps: steps})
}
fmt.Print(Instructions)
for _, instr := range Instructions { for _, instr := range Instructions {
if instr.Steps > 100 { switch instr.Turn {
code = code + (instr.Steps / 100) case Left:
instr.Steps = instr.Steps % 100 new_position = position - instr.Steps%100
case Right:
new_position = position + instr.Steps%100
} }
if instr.Turn == Left { code += instr.Steps / 100
if position-instr.Steps < 0 { if new_position == 0 {
if position != 0 { code++
code++ }
} if new_position < 0 {
position = 100 + (position - instr.Steps) new_position += 100
if position != 0 {
} else { code++
position -= instr.Steps
if position == 0 {
code++
}
} }
} else if instr.Turn == Right { } else if new_position > 99 {
if position+instr.Steps > 99 { new_position -= 100
if position != 0 { if position != 0 {
code++ code++
}
position = (position + instr.Steps) - 100
} else {
position += instr.Steps
if position == 0 {
code++
}
} }
} }
position = new_position
fmt.Println("\n", instr.Turn, instr.Steps, "->", position, "code:", code)
} }
return code return code
} }