Feat: First structure

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Cargo.lock

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Cargo.toml

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+[package]
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+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "4.5.1", features = ["derive"] }

src/main.rs

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+use clap::{Parser, Subcommand};
+
+#[derive(Parser)]
+#[command(version, about, long_about = None)]
+struct Cli {
+    // The sudoku field given as a 1x81 string from left to right, top to bottom, 0 denotes value
+    // absense
+    field: String,
+}
+
+struct Playfield {
+    fields: [[Field; 9]; 9],
+    open_fields: Vec<u8>,
+}
+
+struct Field {
+    possible_values: [u8; 9],
+    value: Option<u8>,
+}
+
+fn main() {
+    let cli = Cli::parse();
+
+    let playfield = parse_field(&cli.field);
+
+    println!("Hello, world!");
+}
+
+fn parse_field(field: &String) -> Playfield {}
+
+mod tests {
+    #[test]
+    fn test_parse_field() {}
+}