Combine AoC Repos

2015/day02/main.go

@@ -0,0 +1,73 @@
+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)
+}