feat: roman to int

Author: FilipeTenedini

resolved/roman-to-int.go

@@ -0,0 +1,27 @@
+package resolved
+
+func RomanToInt(s string) int {
+	hashtable := map[rune]int{
+		'I': 1,
+		'V': 5,
+		'X': 10,
+		'L': 50,
+		'C': 100,
+		'D': 500,
+		'M': 1000,
+	}
+	sum := 0
+
+	for idx, romanValue := range s {
+		if idx != len(s)-1 {
+			if hashtable[romanValue] < hashtable[rune(s[idx+1])] {
+				sum -= hashtable[romanValue]
+			} else {
+				sum += hashtable[romanValue]
+			}
+		} else {
+			sum += hashtable[romanValue]
+		}
+	}
+	return sum
+}