README: add note about day 3 crystal

README.md

@@ -4,4 +4,4 @@ Advent of Code 2018, my solutions, any language
 
  - day 1: elixir
  - day 2: elixir
- - day 3: python
+ - day 3: python (with a crystal port)

day3/day3_1.cr

@@ -0,0 +1,67 @@
+lines = [] of String
+
+
+class Claim
+  def initialize(@cid : String, @p1 : UInt64, @p2 : UInt64,
+                 @width : UInt64, @height : UInt64)
+  end
+end
+
+cloth = [] of Array(Array(Claim))
+claims = [] of Claim
+
+# initialize cloth
+(0...1000).each do |i|
+  cloth_line = [] of Array(Claim)
+
+  (0...1000).each do |j|
+    # cloth_line << Claim.new("-1", 0, 0, 0, 0)
+    cloth_line << [] of Claim
+  end
+  
+  cloth << cloth_line
+end
+
+while true
+  line = gets '\n'
+
+  if line.nil?
+    break
+  end
+
+  lines << line.strip().gsub(" ", "")
+end
+
+
+lines.each do |line|
+  cid_p, claim_data = line.split('@')
+  p1p2, wh = claim_data.split(':')
+
+  p1, p2 = p1p2.split(',')
+  width, height = wh.split('x')
+  cid = cid_p.gsub("#", "")
+
+  claims << Claim.new(cid, p1.to_u64, p2.to_u64, width.to_u64, height.to_u64)
+end
+
+claims.each do |claim|
+  (claim.@p1...claim.@p1 + claim.@width).each do |x|
+    (claim.@p2...claim.@p2 + claim.@height).each do |y|
+      cloth[x][y] << claim
+    end
+  end
+end
+
+# check the cloth
+overlaps = 0
+
+(0...1000).each do |i|
+  (0...1000).each do |j|
+    claims = cloth[i][j]
+    if claims.size > 1
+      overlaps += 1
+    end
+  end
+end
+
+puts overlaps

day3/day3_1.py

@@ -32,20 +32,15 @@ def main():
         c = Claim(cid, int(p1), int(p2), int(w), int(h))
         claims.append(c)
 
-    pprint.pprint(claims)
     print('running claims')
 
     for claim in claims:
-        print(claim)
         for i in range(claim.p1, claim.p1 + claim.width):
             for j in range(claim.p2, claim.p2 + claim.height):
-                print('claiming', i, j, claim.cid)
-
                 if cloth[i][j] is None:
                     cloth[i][j] = []
 
                 cloth[i][j].append(claim)
-                print('result: ', cloth[i][j])
 
     overlap = 0
 

day3/day3_2.cr

@@ -0,0 +1,75 @@
+lines = [] of String
+
+
+class Claim
+  def initialize(@cid : String, @p1 : UInt64, @p2 : UInt64,
+                 @width : UInt64, @height : UInt64)
+  end
+end
+
+cloth = [] of Array(Array(Claim))
+claims = [] of Claim
+
+# initialize cloth
+(0...1000).each do |i|
+  cloth_line = [] of Array(Claim)
+
+  (0...1000).each do |j|
+    # cloth_line << Claim.new("-1", 0, 0, 0, 0)
+    cloth_line << [] of Claim
+  end
+  
+  cloth << cloth_line
+end
+
+while true
+  line = gets '\n'
+
+  if line.nil?
+    break
+  end
+
+  lines << line.strip().gsub(" ", "")
+end
+
+
+lines.each do |line|
+  cid_p, claim_data = line.split('@')
+  p1p2, wh = claim_data.split(':')
+
+  p1, p2 = p1p2.split(',')
+  width, height = wh.split('x')
+  cid = cid_p.gsub("#", "")
+
+  claims << Claim.new(cid, p1.to_u64, p2.to_u64, width.to_u64, height.to_u64)
+end
+
+claims.each do |claim|
+  (claim.@p1...claim.@p1 + claim.@width).each do |x|
+    (claim.@p2...claim.@p2 + claim.@height).each do |y|
+      cloth[x][y] << claim
+    end
+  end
+end
+
+# check the cloth
+overlaps = Set.new [] of Claim
+claims_set = claims.to_set
+
+(0...1000).each do |i|
+  (0...1000).each do |j|
+    claims = cloth[i][j]
+    if claims.size > 1
+      claims.each do |claim|
+        overlaps << claim
+      end
+    end
+  end
+end
+
+puts claims_set.size
+puts overlaps.size
+
+non_overlap = claims_set - overlaps
+puts non_overlap
+