From ecb42da464e00c9084c23a1ecf96e7be1b97dd25 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Sun, 24 Sep 2023 22:25:33 +0200
Subject: this iteration seems to work not too bad. have to fix index

---
 src/main.rs | 46 ++++++++++++++++++++++++++++++++++++----------
 1 file changed, 36 insertions(+), 10 deletions(-)

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
index 8e2ada4..a2c9488 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -380,6 +380,8 @@ fn gen_level(
         examples.len()
     );
 
+    let avg_len = examples.len() as f32 * 20. / chars.len() as f32;
+
     let mut done = remainder.as_ref()
         .map(|x| x.chars.clone())
         .unwrap_or_default()
@@ -401,6 +403,10 @@ fn gen_level(
         for ex in examples.iter() {
             let mut dyn_row = vec![None; n_chars + 1];
             let chars_common = ex.chars.inter(&chars).diff(&done);
+            if chars_common.len() > 6 {
+                dyn_mat.push(dyn_row);
+                continue;
+            }
             if chars_common.len() < dyn_row.len() {
                 dyn_row[chars_common.len()] = Some((chars_common.clone(), None));
             }
@@ -416,13 +422,33 @@ fn gen_level(
                     }
                 }
             }
-            let stop = dyn_row[n_chars].is_some();
             dyn_mat.push(dyn_row);
-            if stop {
-                break;
-            }
         }
-        let (mut i, mut j) = (dyn_mat.len() - 1, n_chars);
+        let dyn_mat_cnt = |i| {
+            let mut i: usize = i;
+            let mut cnt = 0;
+            let mut j: usize = n_chars;
+            loop {
+                match &dyn_mat[i][j] {
+                    None => return 1000000,
+                    Some((_, ij_prev)) => {
+                        cnt += 1;
+                        match ij_prev {
+                            Some((iprev, jprev)) => {
+                                i = *iprev;
+                                j = *jprev;
+                            }
+                            None => return cnt,
+                        }
+                    }
+                }
+            }
+        };
+        let i = (0..dyn_mat.len()).min_by_key(|i| {
+            let x = dyn_mat_cnt(*i) as i64 - (avg_len as i64 + 2);
+            x * x
+        }).unwrap();
+        let (mut i, mut j) = (i, n_chars);
         loop {
             match &dyn_mat[i][j] {
                 None => break 'outer,
@@ -470,15 +496,15 @@ fn gen_level(
 
     if !examples.is_empty() {
         let n_remaining = chars.diff(&done).len();
-        println!("still {} examples, {} chars", examples.len(), n_remaining);
-        if n_remaining > 20 {
-            return None;
-        }
         let ex_chars = Charset::from_iter(
             examples.iter()
             .map(|x| x.chars.chars().iter().copied())
             .flatten()).diff(&done);
+        println!("still {} examples, {} chars in ex, {} total", examples.len(), ex_chars.len(), n_remaining);
         assert!(ex_chars.len() <= n_remaining);
+        if ex_chars.len() > 20 {
+            return None;
+        }
         let remainder = Batch {
             level: level.to_string(),
             chars: ex_chars,
@@ -522,7 +548,7 @@ fn level_examples<'a>(
 
     while !todo.is_empty() {
         let best = all_with_inter.par_iter().enumerate()
-            .filter(|(_, (_, ex_todo_inter, _))| (1..=4).contains(ex_todo_inter))
+            .filter(|(_, (_, ex_todo_inter, ex_tgt_inter))| (1..=6).contains(ex_todo_inter))
             .max_by_key(
             |(_, (ex, ex_todo_inter, ex_chars_inter))| cost(*ex, *ex_todo_inter, *ex_chars_inter),
         );
-- 
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