getMonthIndex() {
        months=("Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec")
        i=0
        while [ $i -le ${#months[@]} ]; do
                if [ "${months[$i]}" == "$1" ]; then
                        (( i++ ))
                        monthIndex=$i
                        break
                fi
                (( i++ ))
        done
}

if [ $# -eq 0 ]; then
        n=-1
fi

while [ $# -gt 0 ]; do
        case $1 in
                -h)
                        echo ""
                        echo "Meno programu (C) meno autora"
                        echo "Usage: <meno_programu> <arg1> <arg2> ..."
                        echo "<arg1>: xxxxxx"
                        echo "<arg2>: yyyyy"
                        n=-2;;
                -n)
                        shift
                        if [ $(echo $1 | grep -Ec '^[0-9]+$') -eq 0 ]; then
                                echo "Error: '-n': neplatna hodnota" > /dev/stderr
                                exit
                        fi
                        n=$1;;
                *)
                        echo "Error: neplatny argument" > /dev/stderr
                        exit;;
        esac
        shift
done

IFS=$'\n'
actualUser="x"
counter=1

test() {
        (( counter++ ))
        if [ "$user" != "$actualUser" ]; then
                if [ $n -eq -1 ] || [ $counter -gt $n ]; then
                        echo "$actualUser $counter"
                fi
                actualUser="$user"
                counter=0
        fi
}

if [ $n -gt -2 ]; then
        for data in $(last | tail -r | tail -n +3 | grep -v 'still logged in$' | cut -c -10,43- | tr -s ' ' | sort -k 1); do
                user="$(echo $data | cut -d' ' -f1)"
                if [ "$actualUser" == "x" ]; then
                        actualUser="$user"
                fi
                #month="$(echo $data | cut -d' ' -f3)"
                #getMonthIndex $month
                #month=$monthIndex
                #day="$(echo $data | cut -d' ' -f4)"
                timeFrom="$(echo $data | cut -d' ' -f5)"
                timeFromHours="$(echo $timeFrom | cut -d: -f1)"
                #timeFromMinutes="$(echo $timeFrom | cut -d: -f2)"
                timeTo="$(echo $data | cut -d' ' -f7)"
                timeToHours="$(echo $timeTo | cut -d: -f1)"
                timeToMinutes="$(echo $timeTo | cut -d: -f2)"

                if [ $timeFromHours -ge 22 ] || [ $timeFromHours -le 5 ]; then
                        if [ $timeToHours -ge 22 ] || [ $timeToHours -le 5 ]; then
                                if [ $timeToHours -eq 5 ] && [ $timeToMinutes -gt 0 ]; then
                                        continue
                                fi
                                test
                        fi
                fi
        done
fi

test