018.rb (865B)
1 #!/usr/bin/ruby 2 3 vals = [ 4 75, 5 95, 64, 6 17, 47, 82, 7 18, 35, 87, 10, 8 20, 4, 82, 47, 65, 9 19, 1, 23, 75, 3, 34, 10 88, 2, 77, 73, 7, 63, 67, 11 99, 65, 4, 28, 6, 16, 70, 92, 12 41, 41, 26, 56, 83, 40, 80, 70, 33, 13 41, 48, 72, 33, 47, 32, 37, 16, 94, 29, 14 53, 71, 44, 65, 25, 43, 91, 52, 97, 51, 14, 15 70, 11, 33, 28, 77, 73, 17, 78, 39, 68, 17, 57, 16 91, 71, 52, 38, 17, 14, 91, 43, 58, 50, 27, 29, 48, 17 63, 66, 4, 68, 89, 53, 67, 30, 73, 16, 69, 87, 40, 31, 18 4, 62, 98, 27, 23, 9, 70, 98, 73, 93, 38, 53, 60, 4, 23, 19 ] 20 21 r = 1 22 row_i = 1 23 size = 2 24 25 for i in (1...vals.size) do 26 if row_i + size == i 27 size += 1 28 row_i = i 29 end 30 right_i = i - size + 1 31 right = (right_i < row_i) ? vals[right_i] : 0 32 left_i = i - size 33 left = (left_i > row_i - size) ? vals[left_i] : 0 34 vals[i] += (right > left) ? right : left 35 end 36 37 puts vals[row_i, size].sort.last