# 12. Integer to Roman

![](https://4272748102-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LekNH5IywF8mjBxFcnu%2F-MbG4rGvtQEW4G9hryZO%2F-MbLSHy92WdtDW7weg31%2Fimage.png?alt=media\&token=3992d462-d1e5-4867-b8b1-e0d93dbaa247)

![](https://4272748102-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LekNH5IywF8mjBxFcnu%2F-MbG4rGvtQEW4G9hryZO%2F-MbLSNNqcTizerE5p6sl%2Fimage.png?alt=media\&token=f4f68b04-9142-40d7-a247-7c585218a25f)

time: O(n)

space: O(n)

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

too easy...