solve: 12. Integer to Roman in rust & golang

Signed-off-by: rajput-hemant <[email protected]>

Author: rajput-hemant

Diff for: src/0001-0100/012 - Integer to Roman/integer_to_roman.go

@@ -0,0 +1,15 @@
+package main
+
+func intToRoman(num int) string {
+	ones := []string{"", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"}
+	tens := []string{"", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"}
+	hundreds := []string{"", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"}
+	thousands := []string{"", "M", "MM", "MMM"}
+
+	thousand := num / 1000
+	hundred := (num / 100) % 10
+	ten := (num / 10) % 10
+	one := num % 10
+
+	return thousands[thousand] + hundreds[hundred] + tens[ten] + ones[one]
+}

Diff for: src/0001-0100/012 - Integer to Roman/integer_to_roman.rs

@@ -0,0 +1,18 @@
+const ONES: [&str; 10] = ["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"];
+const TENS: [&str; 10] = ["", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"];
+const HUNDS: [&str; 10] = ["", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"];
+const THOUSANDS: [&str; 4] = ["", "M", "MM", "MMM"];
+
+impl Solution {
+    pub fn int_to_roman(num: i32) -> String {
+        let num = num as usize;
+
+        format!(
+            "{}{}{}{}",
+            THOUSANDS[(num / 1000)],
+            HUNDS[(num / 100 % 10)],
+            TENS[(num / 10 % 10)],
+            ONES[(num % 10)]
+        )
+    }
+}