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Add Solution 2: concise Java implementation for 504. Base 7 #4760

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19 changes: 19 additions & 0 deletions solution/0500-0599/0504.Base 7/README_EN.md
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Expand Up @@ -166,6 +166,25 @@ impl Solution {

<!-- tabs:end -->

### Solution 2: Concise Implementation (Integer.toString)

We can directly use Java’s built-in base conversion method.
Time complexity: $O(\log_7 n)$, space complexity: $O(1)$.

<!-- tabs:start -->

#### Java

```java
class Solution {
public String convertToBase7(int num) {
return Integer.toString(num, 7);
}
}
```

<!-- tabs:end -->

<!-- solution:end -->

<!-- problem:end -->