Day 9

day09/ex2/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+  "bufio"
+  "fmt"
+  "os"
+  "aoc2022/day09/common"
+)
+
+func main() {
+  movements := common.Parse(*bufio.NewScanner(os.Stdin))
+  grid := common.NewGrid(10)
+  visited := make(map[common.Position]struct{})
+
+  for _, movement := range movements {
+    tailVisited := grid.Move(movement)
+    for position := range tailVisited {
+      visited[position] = struct{}{}
+    }
+  }
+
+  fmt.Println(len(visited))
+}