49 lines
1.1 KiB
Lua
49 lines
1.1 KiB
Lua
|
function readline()
|
||
|
local x1 = io.read("*n")
|
||
|
io.read(1) -- ","
|
||
|
local y1 = io.read("*n")
|
||
|
io.read(4) -- " -> "
|
||
|
local x2 = io.read("*n")
|
||
|
io.read(1) -- ","
|
||
|
local y2 = io.read("*n")
|
||
|
io.read("*l") -- "...\n"
|
||
|
return x1, y1, x2, y2
|
||
|
end
|
||
|
|
||
|
function mark(field, x, y, count, dx, dy)
|
||
|
local i = 0
|
||
|
while i <= count do
|
||
|
local row = field[x+i*dx] or {}
|
||
|
row[y+i*dy] = (row[y+i*dy] or 0) + 1
|
||
|
field[x+i*dx] = row
|
||
|
i = i + 1
|
||
|
end
|
||
|
end
|
||
|
|
||
|
io.input(arg[3])
|
||
|
local x1, y1, x2, y2 = readline()
|
||
|
local field = {}
|
||
|
while x1 ~= nil do
|
||
|
local x, y, count, dx, dy
|
||
|
if x1 == x2 then
|
||
|
mark(field, x1, math.min(y1, y2), math.abs(y1 - y2), 0, 1)
|
||
|
elseif y1 == y2 then
|
||
|
mark(field, math.min(x1, x2), y1, math.abs(x2 - x1), 1, 0)
|
||
|
elseif x1 + y1 == x2 + y2 then
|
||
|
mark(field, math.min(x1, x2), math.max(y1, y2), math.abs(x1 - x2), 1, -1)
|
||
|
else
|
||
|
mark(field, math.min(x1, x2), math.min(y1, y2), math.abs(x1 - x2), 1, 1)
|
||
|
end
|
||
|
x1, y1, x2, y2 = readline()
|
||
|
end
|
||
|
|
||
|
local count = 0
|
||
|
for r, row in pairs(field) do
|
||
|
for c, col in pairs(row) do
|
||
|
if col >= 2 then
|
||
|
count = count + 1
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
print(count)
|