From 7651c291bf36c77d140f56262077971cb60c6247 Mon Sep 17 00:00:00 2001
From: j-james
Date: Sun, 11 Dec 2022 15:42:22 -0800
Subject: Day Ten (Nim)

---
 2022/nim/day10/src/main.nim | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 2022/nim/day10/src/main.nim

(limited to '2022')

diff --git a/2022/nim/day10/src/main.nim b/2022/nim/day10/src/main.nim
new file mode 100644
index 0000000..04b4423
--- /dev/null
+++ b/2022/nim/day10/src/main.nim
@@ -0,0 +1,39 @@
+# Day 10: Off-by-One Errors
+import std/[os, strutils, sequtils]
+
+let input = paramStr(1).readFile().strip().split("\n")
+let instructions = input.mapIt((it.split(" ")))
+
+var sum = 0
+var clock = 1
+var register = 1
+
+proc tick() =
+  inc clock
+
+proc write(value: string) =
+  register += value.parseInt()
+
+proc compare() =
+  if clock mod 40 == 20:
+    sum += register * clock
+
+proc render() =
+  if abs(register - ((clock-1) mod 40)) < 2:
+    stdout.write("#")
+  else:
+    stdout.write(".")
+  if clock mod 40 == 0:
+    stdout.write("\n")
+
+for ins in instructions:
+  render()
+  tick()
+  compare()
+  if ins.len == 2:
+    render()
+    tick()
+    write(ins[1])
+    compare()
+
+echo sum
-- 
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