Data commit

Task/Roman-numerals-Decode/Swift/roman-numerals-decode-1.swift

@@ -0,0 +1,28 @@
+extension Int {
+    init(romanNumerals: String) {
+        let values = [
+            ( "M", 1000),
+            ("CM",  900),
+            ( "D",  500),
+            ("CD",  400),
+            ( "C",  100),
+            ("XC",   90),
+            ( "L",   50),
+            ("XL",   40),
+            ( "X",   10),
+            ("IX",    9),
+            ( "V",    5),
+            ("IV",    4),
+            ( "I",    1),
+        ]
+
+        self = 0
+        var raw = romanNumerals
+        for (digit, value) in values {
+            while raw.hasPrefix(digit) {
+                self += value
+                raw.removeFirst(digit.count)
+            }
+        }
+    }
+}

Task/Roman-numerals-Decode/Swift/roman-numerals-decode-2.swift

@@ -0,0 +1 @@
+Int(romanNumerals: "MDCLXVI") // 1666