#!/bin/sh
set -eu
HERE="$(dirname "$0")"
if [ -f "$HERE/_reference.py" ]; then
    cd "$HERE"
elif [ -f "$HERE/solution/_reference.py" ]; then
    cd "$HERE/solution"
else
    echo "solve.sh: cannot locate _reference.py relative to $HERE" >&2
    exit 1
fi
cp -f _reference.py solution.py