more progress

2018/src/bin/2018_01b.rs

@@ -5,14 +5,14 @@ use core::read_data;
 
 fn main() {
     let mut visited_locations: HashMap<i32, i32> = HashMap::from([(0, 0)]);
-    // let binding = read_data("2018_01_data.txt");
-    // let lines = binding.lines();
-    let lines = "-6\n+3\n+8\n+5\n-6".to_string();
+    let binding = read_data("2018_01_data.txt");
+     let lines = binding.lines();
+    // let lines = "-6\n+3\n+8\n+5\n-6".to_string();
     let mut working_value = 0i32;
 
-    for line in lines.lines() {
+    for line in lines {
         let (direction, velocity) = line.split_at(1);
-        // println!("{line} split to ||{direction}|| and ||{velocity}||");
+        println!("[[[[{line}]]]] split to ||{direction}|| and ||{velocity}||");
         let direction_val : i32 = velocity.parse().unwrap();
         match direction {
             "+" => {
@@ -25,12 +25,15 @@ fn main() {
                 unreachable!("Invalid direction");
             }
         }
-        print!("{working_value}\t");
+        println!("||{working_value}||\t");
         if let Some(found) = visited_locations.get(&working_value)  {
             println!("GET SUCCESS -> {working_value} / {found}");
             break;
         }
-        visited_locations.insert(working_value, 0);
+        for index in 0..working_value.abs() {
+            println!("Adding visit to {}", index + working_value);
+            visited_locations.insert(index + working_value, 0);
+        }
     }
 }
 // BROKEN

2018/src/bin/2018_02a.rs

@@ -0,0 +1,34 @@
+use std::collections::HashMap;
+use core::read_data;
+
+fn count_letter_frequency(input: &str) -> HashMap<char, u32> {
+    let mut working = HashMap::new();
+    for current_char in input.chars() {
+        working.entry(current_char).and_modify(|x| *x += 1).or_insert(1);
+    }
+
+    working
+}
+
+fn main() {
+    let binding = read_data("2018_02_data.txt");
+    let lines = binding.lines();
+    let mut num_good = 0;
+    let mut num_three = 0;
+    let mut num_two = 0;
+
+    for line in lines {
+        let result= count_letter_frequency(line);
+        let mut found_2 = false;
+        let mut found_3 = false;
+        for (_, count) in result {
+            if count == 2 && !found_2 { found_2 = true; num_two += 1;}
+            if count == 3 && !found_3 { found_3 = true; num_three += 1; }
+        }
+        println!("Found {} {} in ||{line}||",
+                 if found_2 { "✅" } else { "❌" },
+                 if found_3 { "✅" } else { "❌" });
+        if found_2 && found_3 { num_good += 1; }
+    }
+    println!("Found {num_good} good boxes? / Checksum {}", num_two * num_three);
+}