days 7, 8 and 9

9/9.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// cat input | go run 9.go
+
+func main() {
+
+	scanner := bufio.NewScanner(os.Stdin)
+
+	for scanner.Scan() {
+		s := strings.Split(scanner.Text(), "")
+		var keep []string
+
+		// Remove garbage
+		garbage := false
+		garbagecount := 0
+		for i := 0; i < len(s); i++ {
+
+			switch s[i] {
+			case "!":
+				i++
+				continue
+			case "<":
+				if garbage == true {
+					fmt.Println("garbage:", s[i])
+					garbagecount++
+				}
+				garbage = true
+				continue
+			case ">":
+				garbage = false
+				continue
+			default:
+				if !garbage {
+					keep = append(keep, s[i])
+				} else {
+					fmt.Println("garbage:", s[i])
+					garbagecount++
+				}
+			}
+		}
+		fmt.Println(keep)
+
+		// Calculate depth
+		depth := 0
+		total := 0
+		for i := 0; i < len(keep); i++ {
+			switch keep[i] {
+			case "{":
+				depth++
+				total += depth
+			case "}":
+				depth--
+			}
+		}
+		fmt.Println(total, garbagecount)
+	}	
+
+
+}