Ring
Very easy
Execution time limit is 1 second
Runtime memory usage limit is 122.174 megabytes
The area of a ring and radius of an external circle are given. Find the radius of an internal circle.
Input
Two real numbers are given: the area of a ring and the radius of an external circle, which does not exceed 100.
Output
Print the radius of an internal circle with 2 digits after the decimal point.
Examples
Input #1
Answer #1
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