48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
package main
|
|
|
|
import (
|
|
"AOC2021/src/helper"
|
|
"fmt"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
func main() {
|
|
args := os.Args[1:]
|
|
input, err := helper.GetInput(args[0])
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
}
|
|
inputNumbers, _ := helper.MapToNumber(strings.Split(input[0], ","))
|
|
crabMap := make(map[int]int)
|
|
maxPosition := 0
|
|
for _, inputNumber := range inputNumbers {
|
|
if maxPosition < inputNumber {
|
|
maxPosition = inputNumber
|
|
}
|
|
crabMap[inputNumber] += 1
|
|
}
|
|
|
|
lowestFuelConsumption := calculate(crabMap, maxPosition/2, 9999999999)
|
|
for i:= 0; i < maxPosition; i++ {
|
|
fuelConsumption :=calculate(crabMap, i, lowestFuelConsumption)
|
|
if fuelConsumption < lowestFuelConsumption {
|
|
lowestFuelConsumption = fuelConsumption
|
|
}
|
|
}
|
|
fmt.Println(lowestFuelConsumption)
|
|
|
|
}
|
|
|
|
func calculate(crabMap map[int]int, goalPosition int, currentLowestFullConsumption int) int {
|
|
sum := 0
|
|
for positionCrab, amount := range crabMap {
|
|
distance := helper.Abs(positionCrab-goalPosition)
|
|
sum += ((distance) * (distance + 1)/2) * amount
|
|
if sum > currentLowestFullConsumption {
|
|
return sum
|
|
}
|
|
}
|
|
return sum
|
|
}
|