day05

day05/day05.go

@@ -0,0 +1,80 @@
+package day05
+
+import (
+	"aoc2015/aoclib"
+	"bytes"
+)
+
+var vowels = []byte{'a', 'e', 'i', 'o', 'u'}
+var badComps = map[string]struct{}{
+	"ab": {},
+	"cd": {},
+	"pq": {},
+	"xy": {},
+}
+
+func stringIsNiceP1(toTest []byte) bool {
+	doubleChar := false
+	vowelCount := 0
+	for x, c := range toTest {
+		if x > 0 {
+			if toTest[x-1] == c {
+				doubleChar = true
+			}
+			if _, ok := badComps[string(toTest[x-1:x+1])]; ok {
+				return false
+			}
+		}
+		if bytes.Contains(vowels, []byte{c}) {
+			vowelCount++
+		}
+	}
+
+	if doubleChar && vowelCount >= 3 {
+		return true
+	}
+
+	return false
+}
+
+func stringIsNiceP2(toTest []byte) bool {
+	spacedChar := false
+	doubleRepeat := false
+	for x, c := range toTest {
+		if x > 1 {
+			if toTest[x-2] == c {
+				spacedChar = true
+			}
+		}
+		if x > 2 {
+			for i := 0; i < x-2; i++ {
+				if toTest[i] == toTest[x-1] && toTest[i+1] == toTest[x] {
+					doubleRepeat = true
+				}
+			}
+		}
+	}
+	return spacedChar && doubleRepeat
+}
+
+func Part1(puzzle aoclib.Puzzle) interface{} {
+	niceCount := 0
+	for _, toCheck := range puzzle.GetInputArray() {
+		if stringIsNiceP1([]byte(toCheck)) {
+			niceCount++
+		}
+	}
+
+	return niceCount
+}
+
+func Part2(puzzle aoclib.Puzzle) interface{} {
+	niceCount := 0
+	for _, toCheck := range puzzle.GetInputArray() {
+		if stringIsNiceP2([]byte(toCheck)) {
+			niceCount++
+		}
+	}
+
+	return niceCount
+}

inputs/5_test

@@ -0,0 +1,5 @@
+ugknbfddgicrmopn
+aaa
+jchzalrnumimnmhp
+haegwjzuvuyypxyu
+dvszwmarrgswjwmb

main.go

@@ -6,6 +6,7 @@ import (
 	"aoc2015/day02"
 	"aoc2015/day03"
 	"aoc2015/day04"
+	"aoc2015/day05"
 	"flag"
 	"fmt"
 	"os"
@@ -34,6 +35,9 @@ func initDayFunctions() {
 	dayFunctions[4] = make(map[int]func(puzzle aoclib.Puzzle) interface{})
 	dayFunctions[4][1] = day04.Part1
 	dayFunctions[4][2] = day04.Part2
+	dayFunctions[5] = make(map[int]func(puzzle aoclib.Puzzle) interface{})
+	dayFunctions[5][1] = day05.Part1
+	dayFunctions[5][2] = day05.Part2
 }
 
 func execute(thisDay int) {