Add template + setup script to get started quickly

2022/aoc_template/src/main.rs

@@ -0,0 +1,21 @@
+fn main() {
+    // Use command line arguments to specify the input filename.
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() < 2 {
+        panic!("Usage: ./main <input-file>\nNo input file provided. Exiting.");
+    }
+
+    // Next, read the contents of the input file into a string for easier processing.
+    let input = std::fs::read_to_string(&args[1]).expect("Error opening file");
+    // Line-by-line processing is easiest.
+    let input = input.lines();
+
+    // --- TASK BEGIN ---
+    let mut result = 0;
+
+    for line in input {
+    }
+
+    println!("Result: {}", result);
+}
+