本帖最后由 Asss-whom 于 2022-8-9 17:58 编辑
- pub fn run() -> Result<(), Box<dyn std::error::Error>> {
- let arr = [
- [
- 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 num = (0..4)
- .filter_map(|i| match i {
- 0 => (0..20)
- .filter_map(|j| {
- (0..17)
- .map(|k| (0..4).map(|l| arr[j][k + l]).fold(1, |acc, x| acc * x))
- .max()
- })
- .max(),
- 1 => (0..17)
- .filter_map(|j| {
- (0..20)
- .map(|k| (0..4).map(|l| arr[j + l][k]).fold(1, |acc, x| acc * x))
- .max()
- })
- .max(),
- 2 => (0..17)
- .filter_map(|j| {
- (0..17)
- .map(|k| (0..4).map(|l| arr[j + l][k + l]).fold(1, |acc, x| acc * x))
- .max()
- })
- .max(),
- 3 => (3..20)
- .filter_map(|j| {
- (0..17)
- .map(|k| (0..4).map(|l| arr[j - l][k + l]).fold(1, |acc, x| acc * x))
- .max()
- })
- .max(),
- _ => unreachable!(),
- })
- .max();
- println!("{:?}", num);
- Ok(())
- }
复制代码
[Project Euler 11]
Some(70600674)
[Task finished in 0.0003528s] |