2015 day 1 (redoing lost challenges)

2015/.gitignore

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+target/

2015/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "aoc2015"
+version = "0.1.0"

2015/Cargo.toml

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+[package]
+name = "aoc2015"
+version = "0.1.0"
+authors = ["dece <shgck@pistache.land>"]
+edition = "2018"
+
+[lib]
+name = "aoc"
+
+[dependencies]

2015/src/bin/day1.rs

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+use aoc::input;
+
+fn main() {
+    let lines = input::read_lines();
+    let line = lines[0].to_owned();
+
+    // Part 1
+    let mut floor = 0;
+    for c in line.chars() {
+        match c {
+            '(' => floor += 1,
+            ')' => floor -= 1,
+            _ => {}
+        }
+    }
+    println!("Floor: {}", floor);
+
+    // Part 2
+    floor = 0;
+    for (i, c) in line.chars().enumerate() {
+        match c {
+            '(' => floor += 1,
+            ')' => floor -= 1,
+            _ => {}
+        }
+        if floor == -1 {
+            println!("Entered -1 at {}.", i + 1);
+            return
+        }
+    }
+}

2015/src/input.rs

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+use std::io;
+
+pub fn read_lines() -> Vec<String> {
+    let mut lines = vec!();
+    loop {
+        let mut text = String::new();
+        let read_count = io::stdin().read_line(&mut text).unwrap();
+        if read_count == 0 {
+            break
+        }
+        if let Some(stripped) = text.strip_suffix("\n") {
+            text = stripped.to_string()
+        }
+        lines.push(text);
+    }
+    lines
+}

2015/src/lib.rs

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+pub mod input;