2019. Day 1

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

2019/day_01/day_01.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+)
+
+func requiredFuel(mass int) int {
+	// Part 1
+	fuelReq := (mass / 3) - 2
+	// Part 2
+	if fuelReq <= 0 {
+		return 0
+	}
+	return fuelReq + requiredFuel(fuelReq)
+}
+
+func main() {
+	file, err := os.Open("./input")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer file.Close()
+
+	var fuelReq int = 0
+
+	scan := bufio.NewScanner(file)
+
+	for scan.Scan() {
+		mass, err := strconv.Atoi(scan.Text())
+		if err != nil {
+			log.Printf("Error converting line to int: %v", err)
+		} else {
+			fuelReq += requiredFuel(mass)
+		}
+	}
+	fmt.Println(fuelReq)
+}

2019/day_01/input

@@ -0,0 +1,100 @@
+125050
+115884
+132344
+67441
+119823
+86204
+111093
+99489
+67860
+51288
+62815
+65263
+56540
+81380
+96101
+116351
+56330
+123123
+133969
+115050
+137851
+136900
+71254
+53458
+139976
+140218
+117085
+52241
+71251
+136110
+103784
+132893
+140216
+85568
+94327
+85200
+136753
+110917
+147197
+120161
+81684
+56987
+143452
+94728
+138355
+54577
+59898
+69123
+133769
+118418
+93530
+50297
+71543
+113383
+135203
+140129
+70977
+58566
+129593
+137456
+130100
+130915
+88872
+96014
+62746
+127048
+89522
+62021
+85363
+143611
+135995
+65836
+146022
+119911
+127381
+121007
+71577
+129637
+90271
+54640
+117213
+116151
+114022
+107683
+102079
+94388
+135676
+69019
+104056
+124799
+107998
+148696
+122793
+135417
+52981
+122890
+142491
+88137
+57609
+54921