Solution (leetcode-in-java 1.21 API)

java.lang.Object
- g0401_0500.s0470_implement_rand10_using_rand7.Solution

```
public class Solution
extends Object
```
470 - Implement Rand10() Using Rand7().
Medium

Given the API rand7() that generates a uniform random integer in the range [1, 7], write a function rand10() that generates a uniform random integer in the range [1, 10]. You can only call the API rand7(), and you shouldn’t call any other API. Please do not use a language’s built-in random API.

Each test case will have one internal argument n, the number of times that your implemented function rand10() will be called while testing. Note that this is not an argument passed to rand10().

Example 1:

Input: n = 1

Output: [2]

Example 2:

Input: n = 2

Output: [2,8]

Example 3:

Input: n = 3

Output: [3,8,10]

Constraints:
- 1 <= n <= 10⁵
Follow up:
- What is the expected value for the number of calls to rand7() function?
- Could you minimize the number of calls to rand7()?

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  int rand10()
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Solution
```
public Solution()
```
- Method Detail
  - rand10
```
public int rand10()
```