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+# project euler 70
+Φ ← ⁅×/×-⊸÷⊙1◴⊸°/× # from uiua discord by maweo
+p ← ≍∩(⍆°⋕)⊸Φ
+b ← =⊸/↧≡(÷⊸Φ)
+s ← ▽⊸(↧b⟜≡p)
+σ ← ▽⊸(=⊸(/↧)≡/÷) ▽⊙(⍉⊟)≡(◡(≍∩(⍆°⋕))⊸Φ)
+σ⍜-₂⇡1e7