the new tests for day 10

12023/10/test3

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+...........
+.S-------7.
+.|F-----7|.
+.||.....||.
+.||.....||.
+.|L-7.F-J|.
+.|..|.|..|.
+.L--J.L--J.
+...........

12023/10/test4

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+.F----7F7F7F7F-7....
+.|F--7||||||||FJ....
+.||.FJ||||||||L7....
+FJL7L7LJLJ||LJ.L-7..
+L--J.L7...LJS7F-7L7.
+....F-J..F7FJ|L7L7L7
+....L7.F7||L7|.L7L7|
+.....|FJLJ|FJ|F7|.LJ
+....FJL-7.||.||||...
+....L---J.LJ.LJLJ...

12023/10/test5

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+FF7FSF7F7F7F7F7F---7
+L|LJ||||||||||||F--J
+FL-7LJLJ||||||LJL-77
+F--JF--7||LJLJ7F7FJ-
+L---JF-JLJ.||-FJLJJ7
+|F|F-JF---7F7-L7L|7|
+|FFJF7L7F-JF7|JL---7
+7-L-JL7||F7|L7F-7F7|
+L.L7LFJ|||||FJL7||LJ
+L7JLJL-JLJLJL--JLJ.L

12023/11/11.lua

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+io.input("input")
+
+galaxies = {}
+empty_rows = {}
+empty_cols = {}
+
+
+incs = {}
+r = 1
+for line in io.lines() do
+    empty_rows[r]  = true
+    for c=1,#line do
+        local char = line:sub(c,c)
+        if char=="#" then
+            local g = table.pack(r, c)
+            table.insert(galaxies, g)
+            table.insert(incs, {0,0})
+
+            empty_rows[r] = nil
+            if empty_cols[c] then empty_cols[c] = nil end
+            --print(r,c)
+        else -- empty col?
+            if r==1 then
+                empty_cols[c] = true
+            end
+        end
+    end
+    r = r+1
+end
+
+print("# galaxies", #galaxies)
+
+expansion = 1000000 -- 2 for part 1, 1000000 for part 2
+
+-- expand empty rows
+for r,_ in pairs(empty_rows) do
+    for i=1,#galaxies do
+        local gr, gc = table.unpack(galaxies[i])
+        local ir, ic = table.unpack(incs[i])
+        if gr>r then ir = ir+expansion-1 end
+        incs[i] = table.pack(ir,ic)
+    end
+end
+
+-- expand empty cols
+for c,_ in pairs(empty_cols) do
+    for i=1,#galaxies do
+        local gr, gc = table.unpack(galaxies[i])
+        local ir, ic = table.unpack(incs[i])
+        if gc>c then ic = ic+expansion-1 end
+        incs[i] = table.pack(ir,ic)
+    end
+end
+
+
+for i=1,#galaxies do
+    local r,c = table.unpack(galaxies[i])
+    local ir, ic = table.unpack(incs[i])
+    galaxies[i] = table.pack(r+ir, c+ic)
+    --print(r+ir,c+ic)
+end
+
+sum1 = 0
+for i=1,#galaxies do
+    local g1r, g1c = table.unpack(galaxies[i])
+    for j=i+1,#galaxies do
+        local g2r, g2c = table.unpack(galaxies[j])
+        local dist = math.abs(g2r-g1r)+math.abs(g2c-g1c)
+        sum1 = sum1 + dist
+--        print(i,j, dist)
+    end
+end
+
+print("result", sum1)

12023/11/test

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+...#......
+.......#..
+#.........
+..........
+......#...
+.#........
+.........#
+..........
+.......#..
+#...#.....