From af98c60972eba709590c93d61f4363d87a21627b Mon Sep 17 00:00:00 2001
From: Johannes <freelon@gmx.net>
Date: Sat, 7 Dec 2024 07:23:00 +0100
Subject: [PATCH] day 7 cleanup

---
 src/day07.rs | 53 +++++++++++-----------------------------------------
 1 file changed, 11 insertions(+), 42 deletions(-)

diff --git a/src/day07.rs b/src/day07.rs
index 5dcf05f..e3f8d35 100644
--- a/src/day07.rs
+++ b/src/day07.rs
@@ -22,24 +22,22 @@ fn part1(input: &str) -> RiddleResult {
                 .map(|capture| capture.as_str().parse::<i64>().unwrap())
                 .collect_vec()
         })
-        .filter(|v| well_calibrated(v, false))
+        .filter(|v| well_calibrated(v))
         .map(|v| v[0])
         .sum()
 }
 
-fn well_calibrated(list: &Vec<i64>, concat: bool) -> bool {
+fn well_calibrated(list: &[i64]) -> bool {
     let expected = list[0];
     let operands = list.iter().skip(1).copied().collect_vec();
-    let operators = ops(operands.len() - 1, concat);
+    let operators = ops(operands.len() - 1);
     for ops in operators.into_iter() {
-        // dbg!(&ops);
         let v = ops
             .into_iter()
             .zip(operands.iter().skip(1))
             .fold(operands[0], |acc, (op, val)| match op {
                 '*' => acc * val,
                 '+' => acc + val,
-                '|' => format!("{acc}{val}").parse().unwrap(),
                 _ => panic!(),
             });
         if v == expected {
@@ -49,46 +47,18 @@ fn well_calibrated(list: &Vec<i64>, concat: bool) -> bool {
     false
 }
 
-fn ops(n: usize, concat: bool) -> Vec<Vec<char>> {
+fn ops(n: usize) -> Vec<Vec<char>> {
     if n == 1 {
-        let mut v = vec![vec!['+'], vec!['*']];
-        if concat {
-            v.push(vec!['|']);
-        }
-        return v;
+        return vec![vec!['+'], vec!['*']];
     }
-    let v = ops(n - 1, concat);
+    let v = ops(n - 1);
     v.into_iter()
         .flat_map(|vector| {
-            if !concat {
-                let mut v1 = vector.clone();
-                let mut v2 = vector;
-                v1.push('+');
-                v2.push('*');
-
-                vec![v1, v2]
-            } else {
-                let mut v1 = vector.clone();
-                let mut v2 = vector.clone();
-                let mut v3 = vector.clone();
-                let mut v4 = vector.clone();
-                let mut v5 = vector.clone();
-                let mut v6 = vector.clone();
-                let mut v7 = vector.clone();
-                let mut v8 = vector.clone();
-                let mut v9 = vector;
-                v1.push('+');
-                v2.push('+');
-                v3.push('+');
-                v4.push('*');
-                v5.push('*');
-                v6.push('*');
-                v7.push('|');
-                v8.push('|');
-                v9.push('|');
-
-                vec![v1, v2, v3, v4, v5, v6, v7, v8, v9]
-            }
+            let mut v1 = vector.clone();
+            let mut v2 = vector;
+            v1.push('+');
+            v2.push('*');
+            [v1, v2]
         })
         .collect_vec()
 }
@@ -122,7 +92,6 @@ fn well(expected: i64, acc: i64, operands: &[i64]) -> bool {
     well(expected, v_mul, remainder)
         || well(expected, v_plus, remainder)
         || well(expected, v_concat, remainder)
-    // _ => panic!(),
 }
 
 #[cfg(test)]