clear

local tool = require'import'
local t = turtle
local long = tonumber(arg[1])
local larg= tonumber(arg[2])
local h = tonumber(arg[3])


function fr(long, h)
    while long>1 do
        turtle.dig()
        while not t.forward() do t.dig() end
        if h>1 then
            turtle.digUp()
        end
        long = long-1
    end
end


function virage(turn, h)
    --0 turn left, 1 turn right
    if turn == 0 then
            turtle.turnLeft()
            turtle.dig()
            while not t.forward() do t.dig() end
            if h>1 then
                turtle.digUp()
            end
            turtle.turnLeft()
            turn = 1
        else
            turtle.turnRight()
            turtle.dig()
            while not t.forward() do t.dig() end
            if h>1 then
                turtle.digUp()
            end
            turtle.turnRight()
            turn = 0
        end
    return turn
end






local turn=1
local nh=0
turtle.dig()
while not t.forward() do t.dig() end
if h>1 then
    turtle.digUp()
end
repeat
    print(h)
    if nh==0 then
        nh= nh+1
    else
        if h>1 then
            turtle.digUp()
            turtle.up()
            h = h-1
        end
        if h>1 then
            turtle.digUp()
            turtle.up()
            h = h-1
        end
    if h>1 then t.digUp() end
    end

    l = 0
    nh2 = 0
    while l<larg do
        if nh2==0 then
            nh2=nh2+1
        else
            turn = virage(turn, h)
        end
        tool.needR()
        fr(long, h)
        l =l+1
    end


    turtle.turnLeft()
    turtle.turnLeft()
until h<=2