PATH=/bin:/usr/bin

if test $# -eq 0
then
    echo usage: nimmove nsticks ... >&2
    exit 1
fi

# compute 'b', the XOR of all piles
b=0
for p
do
    binp=`echo $p 2o p | dc`
    b=`expr $b + $binp | tr 2 0`
done

# strategy depends on whether the big XOR is zero
if test $b -eq 0
then
    # there is no good move
    takesticks=1
    pileno=0
    for p
    do
	pileno=`expr $pileno + 1`
	if test $p -gt 0
	then
	    frompile=$pileno
	fi
    done
else
    # find a pile for which nsticks XOR b is less than nsticks
    pileno=0
    for p
    do
	pileno=`expr $pileno + 1`
	binp=`echo $p 2o p | dc`
	new=`(echo 2i; expr $binp + $b | tr 2 0; echo p) | dc`
	if test $new -lt $p
	then
	    takesticks=`expr $p - $new`
	    frompile=$pileno
	fi
    done
fi

echo I take $takesticks sticks from pile $frompile