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-rw-r--r--tests/queens.apl7
1 files changed, 7 insertions, 0 deletions
diff --git a/tests/queens.apl b/tests/queens.apl
new file mode 100644
index 0000000..a2ce041
--- /dev/null
+++ b/tests/queens.apl
@@ -0,0 +1,7 @@
+dfs←{⊃∇⍨⌿⌽(⊂⍺⍶⍵)⍪⍺⍹⍵}
+atk←{∪∊(⊂⍵)+¯1 0 1×⊂⌽⍳⍴⍵}
+subs←{(⊂⍵)⍪¨(⍳⍴⊃⍺)~atk ⍵}
+accm←{⍺⍪((⍴⍵)=⍴⊃⍺)↑⊂⍵}
+fmt←{(⊂⎕io+⍵=⌾⍳⍴⍵)⌷'∘⎕'}
+queens←{fmt¨ 1↓(↓1 ⍵⍴0)accm dfs subs ⍬}
+⎕←queens 5