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# Karina

**Timelimit: 2**

By Rafael Granza de Mello, UDESC Brazil

Professor Karina usually teaches Discrete Mathematics classes for the Computer Science course. During online classes, she suspected that her students weren't paying attention and decided to take an exam/competition on kahoot.

As the class of the day was about **perfect squares**, in each test/competition question she would give an interval [**L**, **R**] (**limits included**) and would like to know how many **perfect squares** exist within the given interval.

Just to remind you, a **perfect square** is an integer square root number. Ex: *0*, *1*, *4* and *9*.

In the first line, an integer **Q** is passed representing the number of questions in the test/competition. In the next **Q** rows there will be two integers **L**, **R** in each row representing the limits.

The restrictions for the values are as follows:

- \(1 \leq \textbf{Q} \leq 10^3\)
- \(0 \leq \textbf{L} \leq \textbf{R} \leq 10^{8}\)

For each question it is necessary to print an integer representing the number of **perfect squares** within the range [**L**, **R**] (**limits included**).

Input Sample | Output Sample |

2 0 64 1 64 |
9 8 |