Merge pull request #3012 from benmak11/integer-to-roman

Create 0012-integer-to-roman.java

Author: mdmzfzl

java/0012-integer-to-roman.java

@@ -0,0 +1,15 @@
+class Solution {
+    public String intToRoman(int num) {
+        int[] vals = new int[] {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
+        String[] symbols = new String[] {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
+
+        StringBuilder res = new StringBuilder();
+        for (int i = 0; i < vals.length && num >= 0; i++) {
+            while (num >= vals[i]) {
+                num -= vals[i];
+                res.append(symbols[i]);
+            }
+        }
+        return res.toString();
+    }
+}