50 lines
846 B
Go
50 lines
846 B
Go
package days
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import (
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"fmt"
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"math"
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"parnic.com/aoc2019/utilities"
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)
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type Day01 struct {
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nums []int64
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}
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func (d *Day01) Parse() {
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d.nums = utilities.GetIntLines("01p")
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}
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func (d Day01) Num() int {
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return 1
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}
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func (d *Day01) calcFuel(mass int64) int64 {
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return int64(math.Floor(float64(mass)/3)) - 2
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}
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func (d *Day01) Part1() string {
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var totalFuel int64
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for _, mass := range d.nums {
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fuel := d.calcFuel(mass)
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totalFuel += fuel
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}
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return fmt.Sprintf("Fuel required: %s%d%s", utilities.TextBold, totalFuel, utilities.TextReset)
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}
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func (d *Day01) Part2() string {
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var totalFuel int64
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for _, mass := range d.nums {
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for mass > 0 {
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fuel := d.calcFuel(mass)
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if fuel > 0 {
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totalFuel += fuel
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}
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mass = fuel
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}
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}
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return fmt.Sprintf("Fuel required: %s%d%s", utilities.TextBold, totalFuel, utilities.TextReset)
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}
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