## Problem 129

### Description

Given a real number n, find the square root of n. For example, given n = 9, return 3.

### Solutions

參考 leet code 連接

https://leetcode.com/problems/sqrtx/

假設題目如下

```kotlin
class Solution {
    fun mySqrt(x: Int): Int {
        
    }
}
```

[參考解法](./kotlin/129.md)