Create Roman to integer - Leetcode 13.go

go solution to Roman to integer

Author: ortin779

Roman to Integer - Leetcode 13/Roman to integer - Leetcode 13.go

@@ -0,0 +1,35 @@
+package solution
+
+func romanToInt(s string) int {
+	val := 0
+	prevVal := 1
+	for i := len(s) - 1; i >= 0; i-- {
+		sVal := symbolVal(s[i])
+		if prevVal > sVal {
+			val -= sVal
+		} else {
+			val += sVal
+		}
+		prevVal = sVal
+	}
+	return val
+}
+
+func symbolVal(symbol byte) int {
+	switch symbol {
+	case 'M':
+		return 1000
+	case 'D':
+		return 500
+	case 'C':
+		return 100
+	case 'L':
+		return 50
+	case 'X':
+		return 10
+	case 'V':
+		return 5
+	default:
+		return 1
+	}
+}