https://projecteuler.net/problem=11
どうもグローバルで定数を定義するのができないみたいで、mainの中にstr_tableを書いたらうまくいきました。
あとは、splitも使えてそんなに難しくないです。
from math import max import sys struct Matrix: var a: DynamicVector[Int] var W: Int fn __init__(inout self, a: DynamicVector[Int], W: Int): self.a = a self.W = W fn __getitem__(self, item: Tuple[Int, Int]) -> Int: let i = item.get[0, Int]() let j = item.get[1, Int]() return self.a[i*self.W+j] fn get(self, i: Int, j: Int) -> Int: return self.a[i*self.W+j] fn make_matrix(s: String) -> Matrix: var a = DynamicVector[Int]() try: let v = s.split('\n') for i in range(1, v.size-1): let w = v[i].strip().split(' ') for j in range(20): a.push_back(atol(w[j])) except: pass return Matrix(a, 20) fn product(x: Int, y: Int, M: Matrix) -> Int: var dirs = DynamicVector[Tuple[Int, Int]]() dirs.push_back((1, 0)) dirs.push_back((0, 1)) dirs.push_back((1, 1)) dirs.push_back((1, -1)) var max_p = 0 for i in range(dirs.size): let dir = dirs[i] let dx = dir.get[0, Int]() let dy = dir.get[1, Int]() let x1 = dx*3 + x let y1 = dy*3 + y if not (0 <= x1 < 20 and 0 <= y1 < 20): continue var p = 1 for j in range(4): p *= M[(x+dx*j, y+dy*j)] max_p = max(max_p, p) return max_p fn f(s: String) -> Int: let M = make_matrix(s) var max_p = 0 for x in range(20): for y in range(20): max_p = max(max_p, product(x, y, M)) return max_p fn main(): let str_table = """ 08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08 49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00 81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 03 49 13 36 65 52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 02 36 91 22 31 16 71 51 67 63 89 41 92 36 54 22 40 40 28 66 33 13 80 24 47 32 60 99 03 45 02 44 75 33 53 78 36 84 20 35 17 12 50 32 98 81 28 64 23 67 10 26 38 40 67 59 54 70 66 18 38 64 70 67 26 20 68 02 62 12 20 95 63 94 39 63 08 40 91 66 49 94 21 24 55 58 05 66 73 99 26 97 17 78 78 96 83 14 88 34 89 63 72 21 36 23 09 75 00 76 44 20 45 35 14 00 61 33 97 34 31 33 95 78 17 53 28 22 75 31 67 15 94 03 80 04 62 16 14 09 53 56 92 16 39 05 42 96 35 31 47 55 58 88 24 00 17 54 24 36 29 85 57 86 56 00 48 35 71 89 07 05 44 44 37 44 60 21 58 51 54 17 58 19 80 81 68 05 94 47 69 28 73 92 13 86 52 17 77 04 89 55 40 04 52 08 83 97 35 99 16 07 97 57 32 16 26 26 79 33 27 98 66 88 36 68 87 57 62 20 72 03 46 33 67 46 55 12 32 63 93 53 69 04 42 16 73 38 25 39 11 24 94 72 18 08 46 29 32 40 62 76 36 20 69 36 41 72 30 23 88 34 62 99 69 82 67 59 85 74 04 36 16 20 73 35 29 78 31 90 01 74 31 49 71 48 86 81 16 23 57 05 54 01 70 54 71 83 51 54 69 16 92 33 48 61 43 52 01 89 19 67 48 """ let s = String(str_table) print(f(s))
