Maria has been hired by the Ghastly Chemicals Junkies (GCJ) company to help them manufacture bullseyes. A bullseye consists of a number of concentric rings (rings that are centered at the same point), and it usually represents an archery target. GCJ is interested in manufacturing black-and-white bullseyes.
Maria starts with millilitres of black paint, which she will use to draw rings of thickness (one centimetre). A ring of thickness is the space between two concentric circles whose radii differ by .
Maria draws the first black ring around a white circle of radius . Then she repeats the following process for as long as she has enough paint to do so:
Maria imagines a white ring of thickness around the last black ring.
Then she draws a new black ring of thickness around that white ring.
Note that each "white ring" is simply the space between two black rings.
The area of a disk with radius is . One millilitre of paint is required to cover area . What is the maximum number of black rings that Maria can draw? Please note that:
Maria only draws complete rings. If the remaining paint is not enough to draw a complete black ring, she stops painting immediately.
There will always be enough paint to draw at least one black ring.
输入格式
The first line of the input gives the number of test cases, . test cases follow. Each test case consists of a line containing two space separated integers: and .
输出格式
For each test case, output one line containing "Case #x: ", where is the case number (starting from ) and is the maximum number of black rings that Maria can draw.
