Day 1 solution.

jayfoad · Dec 1, 2018 · 399d9ae · 399d9ae
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diff --git a/p1.dyalog b/p1.dyalog
@@ -0,0 +1,4 @@
+p←⍎¨⊃⎕NGET'p1.txt'1
++/p ⍝ part 1
+q←+\1E6⍴p
+q⊃⍨1⍳⍨(q⍳q)≠⍳≢q ⍝ part 2