src/day4/puzzle1.typ

@@ -1,11 +1,10 @@
 #import "/src/utils.typ": *
-#import "@preview/cetz:0.3.1": canvas, draw
 
 #let check-xmas(lines, ox, oy) = {
   let w = lines.first().len()
   let h = lines.len()
 
-  let dirs = ()
+  let total = 0
   for dy in (-1, 0, 1) {
     for dx in (-1, 0, 1) {
       if dx == 0 and dy == 0 {
@@ -27,11 +26,11 @@
         }
       }
       if buffer == "XMAS" {
-        dirs.push((dx, dy))
+        total += 1
       }
     }
   }
-  return dirs
+  return total
 }
 
 #let solve(input) = {
@@ -43,7 +42,7 @@
   for y in range(h) {
     for x in range(w) {
       if lines.at(y).at(x) == "X" {
-        total += check-xmas(lines, x, y).len()
+        total += check-xmas(lines, x, y)
       }
     }
   }
@@ -51,41 +50,8 @@
   return total
 }
 
-#let visualize(input) = {
-  let lines = input.split("\n")
-  let w = lines.first().len()
-  let h = lines.len()
-
-  canvas({
-    for y in range(h) {
-      for x in range(w) {
-        if lines.at(y).at(x) == "X" {
-          let key = str(x) + "-" + str(y)
-          let dirs = check-xmas(lines, x, y)
-          draw.on-layer(2, {
-            for (dx, dy) in dirs {
-              draw.line(
-                (x + dx * 0.2, y + dy * 0.2),
-                (x + dx * 2.8, y + dy * 2.8),
-                stroke: red,
-                fill: red,
-                mark: (end: ">")
-              )
-            }
-          })
-        }
-        draw.content(
-          (x, y),
-          lines.at(y).at(x)
-        )
-      }
-    }
-  })
-}
-
 #show-puzzle(
   4, 1,
   solve,
-  example: 18,
-  visualize: visualize
+  example: 18
 )

src/day4/puzzle2.typ

@@ -1,5 +1,4 @@
 #import "/src/utils.typ": *
-#import "@preview/cetz:0.3.1": canvas, draw
 
 #let solve(input) = {
   let lines = input.split("\n")
@@ -27,62 +26,8 @@
   return total
 }
 
-#let visualize(input) = {
-  let lines = input.split("\n")
-  let w = lines.first().len()
-  let h = lines.len()
-
-  let perms = (("M", "S"), ("S", "M"))
-  let positions = ()
-  for y in range(1, h - 1) {
-    for x in range(1, w - 1) {
-      if lines.at(y).at(x) == "A" {
-        let tl = lines.at(y - 1).at(x - 1)
-        let tr = lines.at(y - 1).at(x + 1)
-        let bl = lines.at(y + 1).at(x - 1)
-        let br = lines.at(y + 1).at(x + 1)
-        let tlbr = (tl, br)
-        let bltr = (bl, tr)
-        if tlbr in perms and bltr in perms {
-          positions.push((x, y))
-        }
-      }
-    }
-  }
-
-  canvas({
-    for y in range(h) {
-      for x in range(w) {
-        let valid = (x, y) in positions
-        if valid {
-          draw.circle(
-            (x, y),
-            radius: 0.3,
-            stroke: red,
-            name: str(x) + "-" + str(y)
-          )
-          for dy in (-1, 1) {
-            for dx in (-1, 1) {
-              draw.line(
-                str(x) + "-" + str(y),
-                (x + dx * 0.75, y + dy * 0.75),
-                stroke: red
-              )
-            }
-          }
-        }
-        draw.content(
-          (x, y),
-          lines.at(y).at(x)
-        )
-      }
-    }
-  })
-}
-
 #show-puzzle(
   4, 2,
   solve,
-  example: 9,
-  visualize: visualize
+  example: 9
 )