Combine AoC Repos

2015/day02/main.go

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+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	var input []string
+	var readInp string
+	for {
+		_, err := fmt.Scan(&readInp)
+		if err != nil {
+			if err != io.EOF {
+				log.Fatal(err)
+			}
+			break
+		}
+		input = append(input, readInp)
+	}
+	var totalPaper, totalRibbon int
+	for _, k := range input {
+		l, w, h := parseInputString(k)
+		totalPaper += calcPaperForPresent(l, w, h)
+		totalRibbon += calcRibbonForPresent(l, w, h)
+	}
+	fmt.Printf("The elves need %d sq ft of wrapping paper\n", totalPaper)
+	fmt.Printf("and %d ft of ribbon.\n", totalRibbon)
+}
+
+func parseInputString(inp string) (int, int, int) {
+	dim := strings.Split(inp, "x")
+	if len(dim) == 3 {
+		pt1, _ := strconv.Atoi(dim[0])
+		pt2, _ := strconv.Atoi(dim[1])
+		pt3, _ := strconv.Atoi(dim[2])
+		return pt1, pt2, pt3
+	}
+	return 0, 0, 0
+}
+
+func calcPaperForPresent(l, w, h int) int {
+	pt1 := l * w
+	pt2 := w * h
+	pt3 := h * l
+	pt4 := pt3
+	if pt1 < pt2 && pt1 < pt3 {
+		pt4 = pt1
+	} else if pt2 < pt3 {
+		pt4 = pt2
+	}
+	return pt1*2 + pt2*2 + pt3*2 + pt4
+}
+
+func calcRibbonForPresent(l, w, h int) int {
+	var low1, low2 int
+	low2 = h
+	if l < w {
+		low1 = l
+		if w < h {
+			low2 = w
+		}
+	} else {
+		low1 = w
+		if l < h {
+			low2 = l
+		}
+	}
+	return low1*2 + low2*2 + (l * w * h)
+}

2015/day02/problem

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+                                           Advent of Code
+
+   br0xen 40*
+
+     • [About]
+     • [Stats]
+     • [Leaderboard]
+     • [Settings]
+     • [Log out]
+
+--- Day 2: I Was Told There Would Be No Math ---
+
+   The elves are running low on wrapping paper, and so they need to submit an order for more. They
+   have a list of the dimensions (length l, width w, and height h) of each present, and only want
+   to order exactly as much as they need.
+
+   Fortunately, every present is a box (a perfect right rectangular prism), which makes
+   calculating the required wrapping paper for each gift a little easier: find the surface area of
+   the box, which is 2*l*w + 2*w*h + 2*h*l. The elves also need a little extra paper for each
+   present: the area of the smallest side.
+
+   For example:
+
+     • A present with dimensions 2x3x4 requires 2*6 + 2*12 + 2*8 = 52 square feet of wrapping
+       paper plus 6 square feet of slack, for a total of 58 square feet.
+     • A present with dimensions 1x1x10 requires 2*1 + 2*10 + 2*10 = 42 square feet of wrapping
+       paper plus 1 square foot of slack, for a total of 43 square feet.
+
+   All numbers in the elves' list are in feet. How many total square feet of wrapping paper should
+   they order?
+
+   Your puzzle answer was 1588178.
+
+--- Part Two ---
+
+   The elves are also running low on ribbon. Ribbon is all the same width, so they only have to
+   worry about the length they need to order, which they would again like to be exact.
+
+   The ribbon required to wrap a present is the shortest distance around its sides, or the
+   smallest perimeter of any one face. Each present also requires a bow made out of ribbon as
+   well; the feet of ribbon required for the perfect bow is equal to the cubic feet of volume of
+   the present. Don't ask how they tie the bow, though; they'll never tell.
+
+   For example:
+
+     • A present with dimensions 2x3x4 requires 2+2+3+3 = 10 feet of ribbon to wrap the present
+       plus 2*3*4 = 24 feet of ribbon for the bow, for a total of 34 feet.
+     • A present with dimensions 1x1x10 requires 1+1+1+1 = 4 feet of ribbon to wrap the present
+       plus 1*1*10 = 10 feet of ribbon for the bow, for a total of 14 feet.
+
+   How many total feet of ribbon should they order?
+
+   Your puzzle answer was 3783758.
+
+   Both parts of this puzzle are complete! They provide two gold stars: **
+
+   At this point, you should return to your advent calendar and try another puzzle.
+
+   If you still want to see it, you can get your puzzle input.
+
+   You can also [Shareon Twitter Google+ Reddit] this puzzle.
+
+References
+
+   Visible links
+   . http://adventofcode.com/
+   . http://adventofcode.com/about
+   . http://adventofcode.com/stats
+   . http://adventofcode.com/leaderboard
+   . http://adventofcode.com/settings
+   . http://adventofcode.com/auth/logout
+   . https://en.wikipedia.org/wiki/Cuboid#Rectangular_cuboid
+   . http://adventofcode.com/
+   . http://adventofcode.com/day/2/input
+   . https://twitter.com/intent/tweet?text=I%27ve+completed+%22I+Was+Told+There+Would+Be+No+Math%22+%2D+Day+2+%2D+Advent+of+Code&url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F2&related=ericwastl&hashtags=AdventOfCode
+   . https://plus.google.com/share?url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F2
+   . http://www.reddit.com/submit?url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F2&title=I%27ve+completed+%22I+Was+Told+There+Would+Be+No+Math%22+%2D+Day+2+%2D+Advent+of+Code