bendns' repos / aoc
heh
Diffstat
-rw-r--r--src/inp.txt14
-rw-r--r--src/main.rs59
2 files changed, 29 insertions, 44 deletions
diff --git a/src/inp.txt b/src/inp.txt
index 60521d7..f73df03 100644
--- a/src/inp.txt
+++ b/src/inp.txt
@@ -1,10 +1,4 @@
-[22, 8, 165],
-[8, 17, 114],
-[18, 6, 103],
-[25, 6, 145],
-[11, 12, 125],
-[21, 6, 121],
-[18, 3, 50],
-[20, 4, 75],
-[7, 20, 119],
-, \ No newline at end of file
+[2, 0,-2, 0, 3]
+[0, 5,-3, 0, 3]
+[0, 0, 5,-1, 8]
+[0 ,-1, 0, 5, 8] \ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 81c296f..8c1f409 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -38,46 +38,37 @@ extern crate test;
pub mod util;
use atools::prelude::*;
+use std::simd::prelude::*;
pub use util::prelude::*;
#[no_mangle]
pub fn p1(x: &str) -> impl Display {
let x = [
- [22usize, 8, 165],
- [8, 17, 114],
- [18, 6, 103],
- [25, 6, 145],
- [11, 12, 125],
- [21, 6, 121],
- [18, 3, 50],
- [20, 4, 75],
- [7, 20, 119],
- ];
- let mut deer = x.map(|deer| {
- repeat_n(deer[0], deer[1])
- .chain(repeat_n(0, deer[2]))
- .cycle()
- });
- dbg!(deer
- .clone()
- .into_iter()
- .map(|x| x.take(2503).sum::<usize>())
+ [2i64, 0, -2, 0], //3],
+ [0, 5, -3, 0], //3],
+ [0, 0, 5, -1], //8],
+ [0, -1, 0, 5], //8],
+ ]
+ .map(i64x4::from);
+ let cals = [3i64, 3, 8, 8];
+
+ itertools::iproduct!(0i64..=100, 0..=100, 0..=100, 0..=100)
+ .map(|x| x.array())
+ .filter(|x| x.sum() == 100)
+ .filter(|x| x.zip(range()).map(|(n, i)| n * cals[i]).sum() == 500)
+ .map(|y| {
+ y.zip(range())
+ .map(|(n, i)| x[i] * i64x4::splat(n))
+ .into_iter()
+ // add vertically
+ .sum::<i64x4>()
+ // max(0)
+ .simd_max(i64x4::splat(0))
+ // multiply horizontally
+ .reduce_product()
+ })
.max()
- .unwrap());
- let mut states = [0; 9];
- let mut points = [0; 9];
- for _ in 0..2503 {
- deer.iter_mut()
- .ι::<usize>()
- .for_each(|(deer, i)| states[i] += deer.next().unwrap());
- let max = states.into_iter().max().unwrap();
- states
- .into_iter()
- .ι::<usize>()
- .filter(|&(x, _)| x == max)
- .for_each(|(_, i)| points[i] += 1);
- }
- points.into_iter().max().unwrap()
+ .unwrap()
}
fn main() {