# project euler 82

$ 131 & 673 & 234 & 103 & 18
$ 201 & 96 & 342 & 965 & 150
$ 630 & 803 & 746 & 422 & 111
$ 537 & 699 & 497 & 121 & 956
$ 805 & 732 & 524 & 37 & 331
≡◇(⋕°/$"_ & _") ⊜□⊸≠@\n
ε ← # parsed example problem input

# ? cost-matrix
Sol ← /↧≡⌟(
  +⋅⊙⊡◡(
    ⊢path(
      ⤚⬚∞⊡ +[0_1 1_0 ¯1_0] ¤
    | /↥=⊙(-1⧻)⊣⍉)
  )
) ⍉˜⊟0°⊏
⍤⤙≍ 994 Sol ε

&fras "cost-matrix.txt"
⊜(⊜⋕⊸≠@,)⊸≠@\n
Sol