Add part1 of day02

day02/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day02"
+version = "0.1.0"

day02/Cargo.toml

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+[package]
+name = "day02"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

day02/src/main.rs

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+use std::error;
+use std::fs::File;
+use std::io::BufRead;
+use std::io::BufReader;
+
+#[derive(PartialEq)]
+enum Values {
+	Rock,
+	Paper,
+	Scissors,
+}
+
+
+impl Values {
+	fn get_from_str(v: &str) -> Values {
+		match v {
+			"A" => Values::Rock,
+			"B" => Values::Paper,
+			"C" => Values::Scissors,
+			"X" => Values::Rock,
+			"Y" => Values::Paper,
+			"Z" => Values::Scissors,
+			_ => panic!("Unexpected value for Values")
+		}
+	}
+
+	fn get_u32(&self) -> u32 {
+		match self {
+			Values::Rock => 1,
+			Values::Paper => 2,
+			Values::Scissors => 3
+		}
+	}
+
+	fn beats(self, other: Values) -> bool {
+		if self == Values::Rock {
+			other == Values::Scissors
+		} else if self == Values::Paper {
+			other == Values::Rock
+		} else if self == Values::Scissors {
+			other == Values::Paper
+		} else {
+			false
+		}
+	}
+}
+
+
+fn main() -> Result<(), Box<dyn error::Error>> {
+	let f = File::open("input.txt")?;
+	let reader = BufReader::new(f);
+
+	let mut sum: u32 = 0;
+	for line in reader.lines() {
+		let line = line?;
+		let split_result: Vec<&str> = line.split_whitespace().collect();
+		let other = Values::get_from_str(&split_result[0]);
+		let my = Values::get_from_str(&split_result[1]);
+		sum += my.get_u32();
+		if other == my {
+			sum += 3;
+		} else if my.beats(other) {
+			sum += 6;
+		}
+	}
+
+    println!("{}", sum);
+    Ok(())
+}