adventofcode/2021/day24/main.go

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package main
import (
"fmt"
"strings"
h "git.bullercodeworks.com/brian/adventofcode/helpers"
)
func main() {
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inp := h.StdinToStringSlice()
solve(1, inp)
fmt.Println("")
solve(2, inp)
}
type pair struct {
first int
second int
}
func solve(part int, inp []string) {
var model [14]int
var stack []pair
for i := 0; i < 14; i++ {
xAdd := h.Atoi(strings.Fields(inp[18*i+5])[2])
yAdd := h.Atoi(strings.Fields(inp[18*i+15])[2])
if xAdd > 0 {
stack = append(stack, pair{first: yAdd, second: i})
} else {
var s pair
var toAdd int
s, stack = stack[len(stack)-1], stack[:len(stack)-1]
if part == 1 {
toAdd = 9
for toAdd+s.first+xAdd > 9 {
toAdd--
}
} else if part == 2 {
toAdd = 1
for toAdd+s.first+xAdd < 1 {
toAdd++
}
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}
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model[s.second] = toAdd
model[i] = toAdd + s.first + xAdd
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}
}
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fmt.Println("# Part", part)
for i := range model {
fmt.Print(model[i])
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}
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fmt.Println()
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}