From 3e89255cdb49ea9944572b22ca49d5555a05ea91 Mon Sep 17 00:00:00 2001
From: Daniel Flanagan <daniel@lyte.dev>
Date: Wed, 9 Dec 2020 09:44:13 -0600
Subject: [PATCH] Cleanup and ready for day 10

---
 2020/src/aoc2020.nim | 3 +--
 2020/src/day1.nim    | 1 -
 2020/src/day10.nim   | 7 +++++++
 2020/src/day9.nim    | 4 +---
 4 files changed, 9 insertions(+), 6 deletions(-)
 create mode 100644 2020/src/day10.nim

diff --git a/2020/src/aoc2020.nim b/2020/src/aoc2020.nim
index 2f29270..02f0614 100644
--- a/2020/src/aoc2020.nim
+++ b/2020/src/aoc2020.nim
@@ -9,5 +9,4 @@ proc solve_for_day(n: int) {.used.} =
 
 when isMainModule:
   # solve_all()
-  # solve_for_day(1)
-  solve_for_day(9)
+  solve_for_day(10)
diff --git a/2020/src/day1.nim b/2020/src/day1.nim
index 1fa970f..96e87e6 100644
--- a/2020/src/day1.nim
+++ b/2020/src/day1.nim
@@ -4,7 +4,6 @@ let targetSum = 2020
 
 proc findComplement*(nums: openArray[int], complement = targetSum): Option[(int, int)] =
   var targets = initHashSet[int]()
-  echo nums
   for n in nums:
     if targets.contains(complement - n): return some(((complement - n), n))
     else: targets.incl n
diff --git a/2020/src/day10.nim b/2020/src/day10.nim
new file mode 100644
index 0000000..7a4ee8f
--- /dev/null
+++ b/2020/src/day10.nim
@@ -0,0 +1,7 @@
+import streams
+
+proc part1*(s: Stream): int =
+  0
+
+proc part2*(s: Stream): int =
+  0
diff --git a/2020/src/day9.nim b/2020/src/day9.nim
index a8f71cd..d910651 100644
--- a/2020/src/day9.nim
+++ b/2020/src/day9.nim
@@ -5,11 +5,11 @@ const WINDOW = 25
 proc part1*(s: Stream): int =
   var rollingWindow = initDeque[int](WINDOW)
   for i in s.asInts:
-    echo i
     if rollingWindow.len < WINDOW:
       rollingWindow.addFirst(i)
       continue
     else:
+      # TODO: this toSeq every iteration is probably nasty
       let maybe = toSeq(rollingWindow).findComplement(i)
       if maybe.isSome:
         rollingWindow.addFirst(i)
@@ -24,11 +24,9 @@ proc part2*(s: Stream): int =
     var mn = n
     var mx = 0
     var sum = nums[i]
-    echo i, " i: ", nums[i]
     mn = min(nums[i], mn)
     mx = max(nums[i], mx)
     for j in i+1..<nums.len:
-      echo j, " j: ", nums[j], " -- ", sum
       mn = min(nums[j], mn)
       mx = max(nums[j], mx)
       if sum == n: return mn+mx