Day 6

day06/common/signal.go

@@ -0,0 +1,13 @@
+package common
+
+import (
+	"bufio"
+)
+
+type Signal string
+
+
+func Parse(scanner bufio.Scanner) Signal {
+  scanner.Scan()
+  return Signal(scanner.Text())
+}

day06/ex1/main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+  "bufio"
+  "fmt"
+  "os"
+  "aoc2022/day06/common"
+)
+
+func main() {
+  signal := common.Parse(*bufio.NewScanner(os.Stdin))
+  index := 0
+
+  for i := 4; i <= len(signal); i++ {
+    set := make(map[rune]bool)
+    for _, c := range signal[i-4:i] {
+      set[c] = true
+    }
+    if len(set) == 4 {
+      index = i
+      break
+    }
+  }
+
+  fmt.Println(index)
+}

day06/ex2/main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+  "bufio"
+  "fmt"
+  "os"
+  "aoc2022/day06/common"
+)
+
+func main() {
+  signal := common.Parse(*bufio.NewScanner(os.Stdin))
+  index := 0
+
+  for i := 14; i <= len(signal); i++ {
+    set := make(map[rune]bool)
+    for _, c := range signal[i-14:i] {
+      set[c] = true
+    }
+    if len(set) == 14 {
+      index = i
+      break
+    }
+  }
+
+  fmt.Println(index)
+}