From 0aaaacd154ab7e8f9e6476049146082583d0df41 Mon Sep 17 00:00:00 2001
From: Christian Ulrich <christian@ulrich.earth>
Date: Thu, 2 Dec 2021 21:09:43 +0100
Subject: [PATCH] add day2 solution

---
 day02/input     | 1000 +++++++++++++++++++++++++++++++++++++++++++++++
 day02/part1.nim |   50 +++
 day02/part2.nim |   52 +++
 day02/testinput |    6 +
 4 files changed, 1108 insertions(+)
 create mode 100644 day02/input
 create mode 100644 day02/part1.nim
 create mode 100644 day02/part2.nim
 create mode 100644 day02/testinput

diff --git a/day02/input b/day02/input
new file mode 100644
index 0000000..d61291a
--- /dev/null
+++ b/day02/input
@@ -0,0 +1,1000 @@
+forward 2
+down 9
+up 6
+forward 1
+down 5
+down 7
+down 9
+forward 9
+down 8
+up 7
+forward 2
+up 6
+forward 4
+down 5
+down 9
+up 1
+down 9
+forward 8
+forward 6
+forward 6
+forward 5
+forward 9
+up 3
+up 5
+forward 1
+down 4
+down 7
+forward 2
+up 3
+down 8
+forward 1
+down 2
+forward 3
+up 1
+up 1
+up 7
+forward 5
+up 8
+forward 8
+forward 8
+down 6
+forward 1
+forward 5
+forward 4
+forward 6
+forward 5
+down 6
+down 9
+forward 9
+down 8
+forward 6
+down 5
+forward 9
+up 3
+up 1
+down 8
+down 7
+down 9
+forward 7
+down 8
+down 9
+down 5
+down 3
+forward 1
+forward 6
+down 1
+forward 9
+down 5
+forward 7
+up 2
+down 8
+forward 1
+down 4
+down 9
+down 4
+up 5
+forward 4
+forward 6
+forward 1
+down 3
+forward 1
+down 6
+up 5
+up 4
+forward 6
+forward 1
+forward 1
+down 2
+up 4
+up 3
+up 2
+up 6
+down 6
+forward 1
+down 8
+forward 1
+up 6
+forward 7
+down 5
+forward 4
+forward 6
+down 4
+forward 4
+down 4
+down 4
+forward 2
+forward 8
+down 5
+down 1
+down 8
+up 5
+up 8
+down 5
+forward 4
+down 6
+up 7
+forward 2
+down 3
+forward 2
+forward 2
+down 9
+down 3
+up 6
+forward 8
+up 2
+up 9
+forward 4
+down 1
+down 5
+forward 4
+down 2
+down 3
+forward 5
+down 4
+forward 7
+up 4
+forward 6
+up 8
+forward 1
+up 9
+down 4
+forward 2
+down 1
+forward 7
+down 3
+down 2
+forward 5
+down 3
+down 9
+down 9
+up 5
+forward 2
+down 8
+up 9
+forward 4
+down 3
+forward 3
+forward 6
+up 2
+forward 3
+down 1
+down 1
+down 1
+forward 7
+forward 4
+forward 7
+down 5
+down 6
+down 2
+forward 6
+down 3
+up 6
+forward 4
+down 8
+up 1
+forward 8
+down 2
+down 5
+forward 4
+down 9
+forward 2
+forward 2
+down 3
+forward 3
+down 1
+forward 2
+down 7
+forward 3
+forward 9
+up 9
+forward 6
+forward 2
+down 1
+down 5
+forward 6
+forward 6
+down 3
+up 3
+forward 9
+down 7
+down 2
+down 4
+down 7
+forward 5
+up 4
+forward 8
+down 5
+forward 7
+down 7
+up 7
+down 8
+forward 9
+up 5
+forward 1
+down 2
+forward 5
+down 9
+forward 3
+down 5
+forward 8
+forward 3
+up 5
+down 2
+up 3
+forward 2
+up 1
+up 5
+down 8
+forward 2
+down 5
+up 4
+up 5
+up 2
+forward 9
+forward 6
+down 9
+up 9
+forward 6
+forward 4
+forward 3
+forward 7
+up 1
+down 2
+down 6
+down 1
+forward 8
+down 1
+forward 6
+down 8
+forward 8
+down 7
+down 6
+down 5
+forward 2
+up 8
+up 6
+up 5
+down 1
+forward 1
+down 1
+down 5
+forward 7
+forward 3
+down 1
+forward 5
+forward 5
+forward 8
+down 1
+up 2
+down 6
+up 6
+forward 6
+forward 6
+down 3
+forward 9
+up 4
+forward 4
+down 6
+up 1
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+down 2
+down 5
+down 2
+down 6
+up 5
+down 1
+down 1
+forward 3
+forward 7
+forward 3
+up 2
+down 8
+down 4
+down 1
+down 5
+down 1
+down 9
+forward 6
+down 6
+down 4
+down 6
+down 8
+forward 4
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+down 7
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+down 4
+up 4
+down 1
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+up 9
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+down 4
+forward 1
+up 4
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+down 5
+down 7
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+forward 1
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+forward 9
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+up 3
+forward 4
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+up 8
+forward 3
+up 5
+down 3
+down 8
+forward 8
+down 6
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+down 6
+down 6
+up 9
+down 2
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+up 9
+down 7
+up 9
+up 8
+up 1
+forward 6
+forward 9
+down 2
+forward 8
+down 1
+up 4
+forward 4
+forward 7
+up 2
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+down 5
+forward 3
+down 2
+down 7
+down 4
+down 2
+up 5
+down 5
+down 5
+down 4
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+forward 7
+down 6
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+forward 1
+down 4
+up 9
+down 5
+forward 7
+forward 5
+down 6
+down 3
+down 9
+down 1
+forward 6
+up 2
+down 7
+down 3
+down 6
+up 3
+down 4
+down 4
+forward 9
+down 3
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+down 9
+down 8
+up 4
+down 2
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+down 5
+down 4
+down 4
+down 2
+forward 6
+down 3
+forward 1
+down 4
+forward 7
+down 5
+up 4
+down 6
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+up 7
+forward 1
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+down 5
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+down 1
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+up 5
+forward 6
+down 6
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+forward 7
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+up 2
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+up 7
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+up 3
+down 3
+forward 9
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+down 1
+up 8
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+down 3
+up 6
+forward 6
+forward 1
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+down 8
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+down 6
+up 9
+down 4
+up 3
+up 9
+forward 2
+down 2
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+forward 3
+down 2
+forward 5
+forward 4
+up 8
+forward 9
+up 7
+forward 2
+down 5
+down 6
+forward 8
+up 7
+forward 4
+forward 3
+up 5
+down 8
+forward 3
+up 2
+down 3
+forward 6
+down 9
+down 2
+down 6
+down 2
+forward 7
+forward 5
+forward 7
+down 8
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+up 8
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+up 7
+down 4
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+down 1
+up 6
+up 4
+down 3
+up 1
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+forward 7
+forward 8
+down 1
+forward 5
+down 6
+forward 9
+forward 7
+forward 7
+down 4
+up 4
+down 6
+down 9
+up 4
+up 2
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+up 4
+up 6
+down 2
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+down 9
+forward 9
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+down 1
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+down 8
+down 8
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+down 5
+forward 5
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+forward 4
+down 7
+forward 8
+forward 1
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+up 9
+down 7
+forward 9
+forward 4
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+down 9
+forward 4
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+down 2
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+down 2
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+forward 3
+up 2
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+down 3
+down 8
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+down 5
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+down 2
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+down 3
+up 4
+down 7
+forward 7
+up 1
+up 9
+down 1
+down 2
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+down 3
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+up 6
+forward 5
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+forward 4
+down 5
+forward 7
+forward 3
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+down 5
+forward 4
+down 5
+up 4
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+up 3
+down 3
+up 5
+forward 4
+forward 5
+down 6
+forward 6
+forward 1
+forward 8
+down 6
+down 9
+up 5
+forward 2
+forward 8
+up 6
+down 6
+forward 2
+down 8
+forward 7
+forward 7
+down 5
+forward 5
+forward 8
+forward 1
+down 4
+down 2
+down 5
+up 4
+forward 3
+forward 5
+down 4
+down 7
+down 4
+up 9
+up 6
+forward 1
+down 8
+up 8
+up 9
+forward 2
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+up 2
+up 1
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+up 5
+down 1
+forward 8
+forward 6
+up 6
+forward 9
+down 5
+down 9
+forward 2
+down 3
+up 1
+up 7
+down 1
+forward 8
+up 9
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+down 5
+down 7
+down 5
+down 5
+down 5
+up 9
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+forward 4
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+up 4
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+up 6
+forward 3
+down 6
+up 8
+down 7
+forward 3
+forward 6
+down 7
+forward 6
+forward 4
+forward 4
+down 4
+forward 6
+forward 5
+down 6
+forward 6
+down 7
+forward 6
+forward 3
+up 4
+up 2
+up 6
+down 2
+down 8
+forward 5
+forward 1
+up 4
+forward 7
+forward 9
+up 6
+down 7
+down 3
+up 5
+forward 5
+down 8
+up 1
+down 1
+down 3
+down 2
+down 1
+forward 5
+down 3
+down 5
+forward 7
+forward 9
+down 3
+forward 7
+forward 5
+forward 4
+forward 2
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+forward 8
+forward 6
+down 8
+forward 5
+forward 6
+forward 6
+down 8
+down 2
+forward 4
+down 7
+forward 6
+down 7
+down 4
+forward 6
+up 6
+forward 4
+forward 9
+forward 2
+forward 3
+forward 1
+down 8
+down 3
+forward 4
+up 3
+forward 7
+forward 1
+down 7
+down 8
+forward 1
+up 8
+forward 8
+up 8
+down 5
+forward 6
+down 8
+down 4
+down 9
+up 1
+down 3
+forward 6
+down 6
+forward 7
+forward 3
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+down 1
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+up 6
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+forward 5
+down 6
+forward 8
+forward 6
+down 7
+forward 1
+forward 4
+forward 9
+forward 2
+forward 4
+down 2
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+down 1
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+down 5
+down 3
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+up 8
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+forward 2
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+up 3
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+down 7
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+forward 3
+forward 7
+down 1
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+forward 1
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+down 6
+forward 2
+down 3
+down 1
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+up 5
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+up 7
+down 6
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+down 9
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+up 4
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+down 5
+up 7
+down 2
+up 2
+up 7
+forward 5
+down 6
+forward 4
+down 4
+down 3
+forward 2
+up 2
+down 5
+forward 8
+down 3
+up 7
+down 1
+down 7
+forward 7
+forward 4
+forward 7
+down 2
+down 9
+down 6
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+down 7
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+down 3
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diff --git a/day02/part1.nim b/day02/part1.nim
new file mode 100644
index 0000000..5486990
--- /dev/null
+++ b/day02/part1.nim
@@ -0,0 +1,50 @@
+# Copyright 2021 Christian Ulrich
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# usage: ./part1 < input
+
+import strutils
+
+proc position(): int =
+  var
+    line = ""
+    hpos = 0
+    vpos = 0
+  while readLine(stdin, line):
+    if line.len() > 0:
+      let command = line.split(' ', 1)
+      if command.len() != 2:
+        raise newException(ValueError, "invalid command")
+      let arg = parseInt(command[1])
+      case command[0]
+      of "forward":
+        hpos.inc(arg)
+      of "up":
+        vpos.dec(arg)
+      of "down":
+        vpos.inc(arg)
+      else:
+        raise newException(ValueError, "invalid command")
+  result = hpos * vpos
+
+proc main(): int =
+  try:
+    echo position()
+  except Exception as error:
+    echo error.msg
+    result = -1
+
+when isMainModule:
+  quit(main())
diff --git a/day02/part2.nim b/day02/part2.nim
new file mode 100644
index 0000000..1a0e048
--- /dev/null
+++ b/day02/part2.nim
@@ -0,0 +1,52 @@
+# Copyright 2021 Christian Ulrich
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# usage: ./part2 < input
+
+import strutils
+
+proc position(): int =
+  var
+    line = ""
+    aim = 0
+    hpos = 0
+    vpos = 0
+  while readLine(stdin, line):
+    if line.len() > 0:
+      let command = line.split(' ', 1)
+      if command.len() != 2:
+        raise newException(ValueError, "invalid command")
+      let arg = parseInt(command[1])
+      case command[0]
+      of "forward":
+        hpos.inc(arg)
+        vpos.inc(aim * arg)
+      of "up":
+        aim.dec(arg)
+      of "down":
+        aim.inc(arg)
+      else:
+        raise newException(ValueError, "invalid command")
+  result = hpos * vpos
+
+proc main(): int =
+  try:
+    echo position()
+  except Exception as error:
+    echo error.msg
+    result = -1
+
+when isMainModule:
+  quit(main())
diff --git a/day02/testinput b/day02/testinput
new file mode 100644
index 0000000..b7172ac
--- /dev/null
+++ b/day02/testinput
@@ -0,0 +1,6 @@
+forward 5
+down 5
+forward 8
+up 3
+down 8
+forward 2