day03

day03/day.go

@@ -0,0 +1,57 @@
+package day03
+
+import (
+	"strconv"
+	"strings"
+	"tools"
+)
+
+func getTriangleList(input []string) (triangleList [][]int) {
+	for _, line := range input {
+		parts := strings.Split(strings.TrimLeft(line, " "), " ")
+		var triparts []int
+		for _, part := range parts {
+			if len(part) == 0 {
+				continue
+			}
+			sidelen, _ := strconv.Atoi(part)
+			triparts = append(triparts, sidelen)
+		}
+		triangleList = append(triangleList, triparts)
+	}
+	return triangleList
+}
+
+func Part1(puzzle tools.AoCPuzzle) interface{} {
+	triangle_list := getTriangleList(puzzle.GetInputArray())
+
+	validCount := 0
+	for _, triangle := range triangle_list {
+		shortSide := tools.Min(triangle...)
+		longSide := tools.Max(triangle...)
+		mediumSide := tools.Sum(triangle...) - shortSide - longSide
+		if shortSide+mediumSide > longSide {
+			validCount++
+		}
+	}
+
+	return validCount
+}
+
+func Part2(puzzle tools.AoCPuzzle) interface{} {
+	triangle_list := getTriangleList(puzzle.GetInputArray())
+
+	validCount := 0
+	for y := 0; y < len(triangle_list)-2; y += 3 {
+		for x := 0; x < 3; x++ {
+			shortSide := tools.Min(triangle_list[y][x], triangle_list[y+1][x], triangle_list[y+2][x])
+			longSide := tools.Max(triangle_list[y][x], triangle_list[y+1][x], triangle_list[y+2][x])
+			mediumSide := tools.Sum(triangle_list[y][x], triangle_list[y+1][x], triangle_list[y+2][x]) - shortSide - longSide
+			if shortSide+mediumSide > longSide {
+				validCount++
+			}
+		}
+	}
+
+	return validCount
+}

inputs/3_test

@@ -0,0 +1 @@
+   5  10  25

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"aoc2016/day01"
 	"aoc2016/day02"
+	"aoc2016/day03"
 	"flag"
 	"fmt"
 	"os"
@@ -22,7 +23,7 @@ func initDayFunctions() {
 	dayFunctions = map[int]map[int]func(puzzle tools.AoCPuzzle) interface{}{
 		1: {1: day01.Part1, 2: day01.Part2},
 		2: {1: day02.Part1, 2: day02.Part2},
-		//		3:  {1: day03.Part1, 2: day03.Part2},
+		3: {1: day03.Part1, 2: day03.Part2},
 		//		4:  {1: day04.Part1, 2: day04.Part2},
 		//		5:  {1: day05.Part1, 2: day05.Part2},
 		//		6:  {1: day06.Part1, 2: day06.Part2},