day14 a bit faster

1 files changed, 7 insertions, 10 deletions

diff --git a/2023/day14.rs b/2023/day14.rs
index cb5ea93..f7a827c 100644
--- a/2023/day14.rs
+++ b/2023/day14.rs
@@ -20,11 +20,11 @@ fn new_north_y(x: usize, y: usize, m: &Vec<Vec<Spc>>) -> usize {
     return 0;
 }
 
-fn rotate_positive(m: Vec<Vec<Spc>>) -> Vec<Vec<Spc>> {
+fn rotate_negative(m: Vec<Vec<Spc>>) -> Vec<Vec<Spc>> {
     let mut out: Vec<Vec<Spc>> = Vec::new();
-    for i in (0..m[0].len()).rev() {
+    for i in 0..m[0].len() {
         let mut r: Vec<Spc> = Vec::new();
-        for j in 0..m.len() {
+        for j in (0..m.len()).rev() {
             r.push(m[j][i]);
         }
         out.push(r);
@@ -100,7 +100,7 @@ fn main() {
 
     let mut c0 = 0;
     let mut c1 = 0;
-    for cycle in 0..1000000000 {
+    for cycle in 1.. {
         for _ in 0..4 {
             for i in 0..m2[0].len() {
                 for j in 0..m2.len() {
@@ -111,20 +111,17 @@ fn main() {
                     }
                 }
             }
-            m2 = rotate_positive(m2);
-            m2 = rotate_positive(m2);
-            m2 = rotate_positive(m2);
+            m2 = rotate_negative(m2);
         }
+        cm.insert(cycle, calc_load(&m2));
         if let Some(cycle_start) = mm.insert(m2.clone(), cycle) {
             c0 = cycle_start;
             c1 = cycle;
             break;
         }
-        cm.insert(cycle, calc_load(&m2));
     }
 
-    // ne vem zakaj rabis ta - 1
-    let res2 = cm[&((1000000000 - c0 - 1) % (c1 - c0) + c0)];
+    let res2 = cm[&((1000000000 - c0) % (c1 - c0) + c0)];
 
     println!("res1: {}", res1);
     println!("res2: {}", res2);