First commit, roman-to-integer

roman-to-integer/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "roman-to-integer"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

roman-to-integer/src/main.rs

@@ -0,0 +1,32 @@
+use std::collections::HashMap;
+
+fn roman_to_int(s: String) -> i32 {
+    let mut map = HashMap::new();
+    map.insert('I', 1);
+    map.insert('V', 5);
+    map.insert('X', 10);
+    map.insert('L', 50);
+    map.insert('C', 100);
+    map.insert('D', 500);
+    map.insert('M', 1000);
+
+    let mut result = 0;
+    let chars: Vec<char> = s.chars().collect();
+
+    for i in 0..chars.len() {
+        let current_value = map[&chars[i]];
+        if i < chars.len() - 1 && current_value < map[&chars[i + 1]] {
+            result -= current_value;
+        } else {
+            result += current_value;
+        }
+    }
+
+    result
+}
+
+fn main() {
+    let roman = String::from("XXVII");
+    let integer = roman_to_int(roman);
+    println!("The integer value is: {}", integer);
+}