Day 2 p1

aoc-02/.gitignore

@@ -0,0 +1 @@
+/target

aoc-02/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc-02"
+version = "0.1.0"

aoc-02/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "aoc-02"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

aoc-02/src/main.rs

@@ -0,0 +1,89 @@
+use std::{fs::File, io::Read};
+
+struct ReportList {
+    reports: Vec<Vec<i64>>,
+}
+
+impl ReportList {
+    fn new() -> ReportList {
+        ReportList { reports: vec![] }
+    }
+
+    fn parse_data(&mut self, buf: String) {
+        for entry in buf.split('\n') {
+            let split_entries = entry.split(' ').collect::<Vec<&str>>();
+            let mut tmp_vec = Vec::<i64>::new();
+            for value in split_entries {
+                tmp_vec.push(value.parse::<i64>().unwrap());
+            }
+            self.reports.push(tmp_vec);
+        }
+        println!("{:?}", self.reports)
+    }
+
+    fn solve(&mut self) {
+        let mut safe = 0;
+        // direction: 0 Ascending, 1 Descending
+        let mut direction = 0;
+        for report in &self.reports {
+            let mut report_safe = true;
+            // Skip the first iteration
+            for (pos, entry) in report.iter().enumerate() {
+                println!("{}", entry);
+                if pos == 0 {
+                    continue;
+                }
+                if pos == 1 {
+                    // Check first two values and see if we need to be ascending or decending
+                    if &report[pos - 1] < entry {
+                        // We are ascending
+                        direction = 0;
+                    } else {
+                        // We are descending
+                        direction = 1;
+                    }
+                }
+
+                // Do the actual solution
+                if direction == 0 {
+                    // Check all values ascending
+                    if (entry - &report[pos - 1]) > 3 {
+                        report_safe = false;
+                    }
+                    if (entry - &report[pos - 1]) <= 0 {
+                        report_safe = false
+                    }
+                } else {
+                    // Check all values descending
+                    if (&report[pos - 1] - entry) > 3 {
+                        report_safe = false;
+                    }
+                    if (&report[pos - 1] - entry) <= 0 {
+                        report_safe = false
+                    }
+                }
+            }
+            if report_safe {
+                safe += 1;
+            }
+        }
+        println!("{}", safe);
+    }
+}
+
+fn load_file(path: String) -> String {
+    let mut buf = String::new();
+    let mut fp = File::open(path).expect("Unable to open file");
+
+    fp.read_to_string(&mut buf).expect("Failed to read file");
+
+    return buf;
+}
+
+fn main() {
+    let mut reportlist = ReportList::new();
+    let data = load_file(String::from("input"));
+
+    reportlist.parse_data(data);
+    reportlist.solve();
+}

aoc-02/test_input

@@ -0,0 +1,7 @@
+7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9
+9 7 6 3 1