## Sherlock and Squares

Watson likes to challenge Sherlock's math ability. He will provide a starting and ending value describing a range of integers. Sherlock must determine the number of *square integers* within that range, inclusive of the endpoints.

**Note**: A square integer is an integer which is the square of an integer, e.g. .

**Input Format**

The first line contains , the number of test cases.

Each of the next lines contains two space-separated integers denoting and , the starting and ending integers in the ranges.

**Constraints**

**Output Format**

For each test case, print the number of square integers in the range on a new line.

**Sample Input**

```
2
3 9
17 24
```

**Sample Output**

```
2
0
```

**Explanation**

*Test Case #00:* In range , and are the two square integers.

*Test Case #01:* In range , there are no square integers.