# Read N Characters Given Read4

The API:`int read4(char *buf)`reads 4 characters at a time from a file.

The return value is the actual number of characters read. For example, it returns 3 if there is only 3 characters left in the file.

By using the`read4`API, implement the function`int read(char *buf, int n)`that readsncharacters from the file.

**Example 1:**

```
Input: buf = "abc", n = 4
Output: "abc"
Explanation: The actual number of characters read is 3, which is "abc".
```

**Example 2:**

```
Input: buf = "abcde", n = 5 
Output: "abcde"
```

**Note:**\
The`read`function will only be called once for each test case.

## Solution

```
/* The read4 API is defined in the parent class Reader4.
      int read4(char[] buf); */

public class Solution extends Reader4 {
    /**
     * @param buf Destination buffer
     * @param n   Maximum number of characters to read
     * @return    The number of characters read
     */
    public int read(char[] buf, int n) {

    }
}
```


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