Preparing for day 17 part 2

diff --git a/src/day17.rs b/src/day17.rs
index 52d5988..8aae48a 100644 (file)
--- a/src/day17.rs
+++ b/src/day17.rs
@@ -31,7 +31,9 @@ pub struct RobotTrackingSystem {
     start_position: (i32, i32),\r
     start_dir: Direction,\r
     crossings: Vec<(i32, i32)>,\r
+\r
     dir_commands: Vec<MovementCommand>,\r
+    commands_sequences: [Vec<(i32, i32)>; 3], // 3 sequences: A, B and C.\r
 }\r
 \r
 impl RobotTrackingSystem {\r
@@ -43,6 +45,7 @@ impl RobotTrackingSystem {
             start_dir: Direction::Up,\r
             crossings: Vec::<(i32, i32)>::new(),\r
             dir_commands: Vec::<MovementCommand>::new(),\r
+            commands_sequences: [Vec::<(i32, i32)>::new(), Vec::<(i32, i32)>::new(), Vec::<(i32, i32)>::new()],\r
         }\r
     }\r
 \r
@@ -136,13 +139,20 @@ impl RobotTrackingSystem {
             break;\r
         }\r
     }\r
+\r
+    fn find_sequences(&mut self) {\r
+        if !self.commands_sequences[0].is_empty() { return; }\r
+\r
+\r
+    }\r
 }\r
 \r
 impl intcode::IO for RobotTrackingSystem {\r
-    // Read instructions \r
+    // Read instructions\r
     fn read(&mut self) -> i64 {\r
         self.build_board_from_output();\r
-        42 // TODO: part2.\r
+        self.find_sequences();\r
+        42\r
     }\r
 \r
     // Send to the output channel.\r
@@ -166,3 +176,22 @@ pub fn part2(code: &[i64]) {
     intcode::execute_op_code_with_custom_io(code, &mut rts);\r
 \r
 }\r
+\r
+#[cfg(test)]\r
+mod tests {\r
+    use super::*;\r
+    use itertools::Itertools;\r
+\r
+    #[test]\r
+    fn foo() {\r
+        let array = vec![1, 2, 3];\r
+        let s: i32 = array.iter().sum();\r
+        dbg!(s);\r
+        let mut combinations: Vec<Vec<i32>> = (3..=7).combinations_with_replacement(3).sorted_by(|v1, v2| {\r
+            let s1: i32 = v1.iter().sum();\r
+            let s2: i32 = v2.iter().sum();\r
+            s1.cmp(&s2)\r
+        }).collect();\r
+        println!("{:?}", combinations);\r
+    }\r
+}
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