README and misc

.gitattributes

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+gettoday merge=ours

.gitignore

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+*.sw?
+aids
+__pycache__/
+tmp
+a.out
+response*
+*.hi
+*.o

README.md

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+# Advent of Code 2021 solutions 
+
+A set of 25 puzzle inputs and 50 puzzle solutions, two for each day. Most can
+be solved in minutes.  The puzzles can be found
+[here](https://adventofcode.com/2021/), although only the first one for each
+day is visible until you solve it.
+
+Most solutions output at most two lines, the answers to part 1 and 2; but some
+provide more information in the form of e.g. graphics.
+
+Run a solution by passing the puzzle input to the program:
+
+```./one_first.awk <input1```
+
+or
+
+```./five.py -v <input5```
+
+or
+
+```
+cd six
+lein run <../input6
+lein run 256 <../input6
+```

gettoday

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+#!/usr/bin/env bash
+year=2021
+day="$(date +%d | sed 's/^0//')"
+case $# in
+    2)
+        year=$2
+        day=$1
+        specifyyear=_$year;;
+    1)
+        day=$1
+esac
+
+file=input$day$specifyyear
+
+cd ~/repos/advent2021 || exit 42
+curl -s -o "$file" -H "Cookie: session=$(cat cookie)" \
+    "https://adventofcode.com/$year/day/$day/input"
+
+git add "$file"