Combine AoC Repos

2015/day05/main.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+)
+
+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 numNice int
+	for _, k := range input {
+		if isNicePt2(k) {
+			numNice++
+		}
+	}
+	fmt.Printf("There are %d nice strings (out of %d total)\n", numNice, len(input))
+}
+
+func isNicePt1(s string) bool {
+	var prev byte
+	var numVowels int
+	var hasDouble bool
+	for i := range s {
+		if s[i] == 'b' && prev == 'a' {
+			return false
+		} else if s[i] == 'd' && prev == 'c' {
+			return false
+		} else if s[i] == 'q' && prev == 'p' {
+			return false
+		} else if s[i] == 'y' && prev == 'x' {
+			return false
+		} else if s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u' {
+			numVowels++
+		}
+		if prev == s[i] {
+			hasDouble = true
+		}
+		prev = s[i]
+	}
+	return (numVowels > 2 && hasDouble)
+}
+
+func isNicePt2(s string) bool {
+	var splitRepeat bool
+	var double bool
+	for i := range s {
+		if i > 0 {
+			double = double || hasDouble(s[i-1], s[i], s[i+1:])
+		}
+		if i > 1 {
+			splitRepeat = splitRepeat || (s[i-2] == s[i])
+		}
+		if double && splitRepeat {
+			return true
+		}
+	}
+	return false
+}
+
+func hasDouble(b1, b2 byte, s string) bool {
+	var prev byte
+	for i := range s {
+		if prev == b1 && s[i] == b2 {
+			return true
+		}
+		prev = s[i]
+	}
+	return false
+}