    read n a b
     
    for i in $(seq $n); do
        x=$(echo $i | sed 's/./&+/g;s/+$//g' | bc -q )
        if [ $a -le $x -a $x -le $b ]; then
            echo $i
        else
            echo 0
        fi
    done |
    awk '{sum+=$1} END{print sum}'