diff --git a/README.md b/README.md
index be20c90..9033054 100644
--- a/README.md
+++ b/README.md
@@ -22,5 +22,5 @@ _in which I attempt to use a different language every day_
 8. Noulith
 9. Picat
 10. Hy
-11. ??
+11. GNU Octave
 12. ??
\ No newline at end of file
diff --git a/d11/README.md b/d11/README.md
index 71484ff..1fe3156 100644
--- a/d11/README.md
+++ b/d11/README.md
@@ -2,10 +2,14 @@
 
 |                   |                   |
 |-------------------|-------------------|
-| Language          | ??                |
-| Input Method      | ??                |
-| Output Method     | ??                |
+| Language          | GNU Octave        |
+| Input Method      | File              |
+| Output Method     | stdout            |
 
 ## Running
+```sh
+octave-cli day11.m <path to input file>
+```
 
-## Notes
\ No newline at end of file
+## Notes
+This is slower than it should be, but it's 2am and I need to go to bed
\ No newline at end of file
diff --git a/d11/day11.m b/d11/day11.m
new file mode 100644
index 0000000..5e89f39
--- /dev/null
+++ b/d11/day11.m
@@ -0,0 +1,82 @@
+file = char (argv ()(1));
+
+f = fopen (file, "r");
+graph = containers.Map ();
+nz = 0;
+nodes = {};
+while ((line = fgetl (f)) != -1)
+  split = strsplit (line, {":", " "});
+  device = char (split(1));
+  connections = split(2:end);
+  graph(device) = connections;
+  nz += length (connections);
+  nodes = union (nodes, split);
+endwhile
+fclose (f);
+
+dim = length (nodes);
+global adjMat;
+adjMat = spalloc (dim, dim, nz);
+for i = 1:dim
+  node = char (nodes(i));
+  if (!isKey(graph, node))
+    continue
+  endif
+
+  adjNodes = graph(node);
+  for adj = adjNodes
+    j = find (ismember (nodes, char (adj)));
+    adjMat(i, j) = 1;
+  endfor
+endfor
+
+youKey = find (ismember (nodes, "you"));
+outKey = find (ismember (nodes, "out"));
+svrKey = find (ismember (nodes, "svr"));
+
+global fftKey;
+global dacKey;
+fftKey = find (ismember (nodes, "fft"));
+dacKey = find (ismember (nodes, "dac"));
+
+function pathCount = numPaths (start, goal)
+  global adjMat;
+  persistent numPathsMemo = memoize (@numPaths);
+  pOneMemo.CacheSize = 1e6;
+
+  pathCount = 1;
+  if (start != goal)
+    pathCount = 0;
+    adjNodes = find (adjMat(start,:));
+    for node = adjNodes
+      pathCount += numPathsMemo (node, goal);
+    endfor
+  endif
+endfunction
+
+function pathCount = partTwo (start, goal, foundDac, foundFft)
+  global adjMat;
+  global fftKey;
+  global dacKey;
+  persistent pTwoMemo = memoize (@partTwo);
+  pTwoMemo.CacheSize = 1e6;
+
+  pathCount = foundDac && foundFft;
+  if (start != goal)
+    if (start == fftKey)
+      foundFft = 1;
+    elseif (start == dacKey)
+      foundDac = 1;
+    endif
+
+    pathCount = 0;
+    adjNodes = find (adjMat(start,:));
+    for node = adjNodes
+      pathCount += pTwoMemo (node, goal, foundDac, foundFft);
+    endfor
+  endif
+endfunction
+
+partOneAnswer = numPaths (youKey, outKey);
+partTwoAnswer = partTwo (svrKey, outKey, 0, 0);
+printf ("%d\n%d\n", partOneAnswer, partTwoAnswer);