🎄 2019 Day 1 Complete! :D 🎄

2019/day01/input

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+71764
+58877
+107994
+72251
+74966
+87584
+118260
+144961
+86889
+136710
+52493
+131045
+101496
+124341
+71936
+88967
+106520
+125454
+113463
+81854
+99918
+105217
+120383
+61105
+103842
+125151
+139191
+143365
+102168
+69845
+57343
+93401
+140910
+121997
+107964
+53358
+57397
+141456
+94052
+127395
+99180
+143838
+130749
+126809
+70165
+92007
+83343
+55163
+95270
+101323
+99877
+105721
+129657
+61213
+130120
+108549
+90539
+111382
+61665
+95121
+53216
+103144
+134367
+101251
+105118
+73220
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+77314
+59134
+98495
+113654
+89711
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+98991
+109068
+129630
+58999
+132095
+98685
+91762
+88589
+73846
+124940
+106944
+133882
+104073
+78475
+76545
+144728
+72449
+118320
+65363
+83523
+124634
+96222
+128252
+112848
+139027
+108208

2019/day01/main.go

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+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"math"
+	"os"
+	"strconv"
+)
+
+func main() {
+	inp := StdinToStringSlice()
+	fmt.Println("Fuel Required:", part1(inp))
+}
+
+func part1(inp []string) int {
+	var total int
+	for _, v := range inp {
+		total = total + part2(fuelRequired(float64(Atoi(v))))
+	}
+	return total
+}
+
+func part2(fuel int) int {
+	ret := fuel
+	for fuel > 0 {
+		fuel = fuelRequired(float64(fuel))
+		fmt.Println(fuel)
+		ret = ret + fuel
+	}
+	return ret
+}
+
+func fuelRequired(mass float64) int {
+	res, _ := math.Modf(mass / 3)
+	if int(res)-2 < 0 {
+		return 0
+	}
+	return int(res) - 2
+}
+
+func StdinToStringSlice() []string {
+	var input []string
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		input = append(input, scanner.Text())
+	}
+	return input
+}
+
+func Atoi(i string) int {
+	var ret int
+	var err error
+	if ret, err = strconv.Atoi(i); err != nil {
+		log.Fatal("Invalid Atoi")
+	}
+	return ret
+}

2019/day01/problem

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+Advent of Code
+
+--- Day 1: The Tyranny of the Rocket Equation ---
+
+   Santa has become stranded at the edge of the Solar System while delivering presents
+   to other planets! To accurately calculate his position in space, safely align his
+   warp drive, and return to Earth in time to save Christmas, he needs you to bring
+   him measurements from fifty stars.
+
+   Collect stars by solving puzzles. Two puzzles will be made available on each day in
+   the Advent calendar; the second puzzle is unlocked when you complete the first.
+   Each puzzle grants one star. Good luck!
+
+   The Elves quickly load you into a spacecraft and prepare to launch.
+
+   At the first Go / No Go poll, every Elf is Go until the Fuel Counter-Upper. They
+   haven't determined the amount of fuel required yet.
+
+   Fuel required to launch a given module is based on its mass. Specifically, to find
+   the fuel required for a module, take its mass, divide by three, round down, and
+   subtract 2.
+
+   For example:
+
+     * For a mass of 12, divide by 3 and round down to get 4, then subtract 2 to get
+       2.
+     * For a mass of 14, dividing by 3 and rounding down still yields 4, so the fuel
+       required is also 2.
+     * For a mass of 1969, the fuel required is 654.
+     * For a mass of 100756, the fuel required is 33583.
+
+   The Fuel Counter-Upper needs to know the total fuel requirement. To find it,
+   individually calculate the fuel needed for the mass of each module (your puzzle
+   input), then add together all the fuel values.
+
+   What is the sum of the fuel requirements for all of the modules on your spacecraft?
+
+   The first half of this puzzle is complete! It provides one gold star: *
+
+--- Part Two ---
+
+   During the second Go / No Go poll, the Elf in charge of the Rocket Equation
+   Double-Checker stops the launch sequence. Apparently, you forgot to include
+   additional fuel for the fuel you just added.
+
+   Fuel itself requires fuel just like a module - take its mass, divide by three,
+   round down, and subtract 2. However, that fuel also requires fuel, and that fuel
+   requires fuel, and so on. Any mass that would require negative fuel should instead
+   be treated as if it requires zero fuel; the remaining mass, if any, is instead
+   handled by wishing really hard, which has no mass and is outside the scope of this
+   calculation.
+
+   So, for each module mass, calculate its fuel and add it to the total. Then, treat
+   the fuel amount you just calculated as the input mass and repeat the process,
+   continuing until a fuel requirement is zero or negative. For example:
+
+     * A module of mass 14 requires 2 fuel. This fuel requires no further fuel (2
+       divided by 3 and rounded down is 0, which would call for a negative fuel), so
+       the total fuel required is still just 2.
+     * At first, a module of mass 1969 requires 654 fuel. Then, this fuel requires 216
+       more fuel (654 / 3 - 2). 216 then requires 70 more fuel, which requires 21
+       fuel, which requires 5 fuel, which requires no further fuel. So, the total fuel
+       required for a module of mass 1969 is 654 + 216 + 70 + 21 + 5 = 966.
+     * The fuel required by a module of mass 100756 and its fuel is: 33583 + 11192 +
+       3728 + 1240 + 411 + 135 + 43 + 12 + 2 = 50346.
+
+   What is the sum of the fuel requirements for all of the modules on your spacecraft
+   when also taking into account the mass of the added fuel? (Calculate the fuel
+   requirements for each module separately, then add them all up at the end.)
+
+References
+
+   Visible links
+   . https://adventofcode.com/
+   . https://adventofcode.com/2019/about
+   . https://adventofcode.com/2019/events
+   . https://adventofcode.com/2019/settings
+   . https://adventofcode.com/2019/auth/logout
+   . Advent of Code Supporter
+	https://adventofcode.com/2019/support
+   . https://adventofcode.com/2019
+   . https://adventofcode.com/2019
+   . https://adventofcode.com/2019/support
+   . https://adventofcode.com/2019/sponsors
+   . https://adventofcode.com/2019/leaderboard
+   . https://adventofcode.com/2019/stats
+   . https://adventofcode.com/2019/sponsors
+   . https://adventofcode.com/2019/day/1/input

dayTemplate/main.go

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+package main
+
+import "fmt"
+
+func main() {
+	inp := StdinToStringSlice()
+	part1(inp)
+	part2(inp)
+}
+
+func part1(inp []string) {
+}
+
+func part2(inp []string) {
+}
+
+func StdinToStringSlice() []string {
+	var input []string
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		input = append(input, scanner.Text())
+	}
+	return input
+}
+
+func Atoi(i string) int {
+	var ret int
+	var err error
+	if ret, err = strconv.Atoi(i); err != nil {
+		log.Fatal("Invalid Atoi")
+	}
+	return ret
+}

mkday.sh

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+#!/bin/bash
+
+YR=$1
+DY=$2
+
+cp -R dayTemplate "$YR/$DY"