There are N lights above a road along the X-axis. The i-th light has Xi as its X-coordinate, and it is hung Yi above the road. The i-th light illuminates a triangular area, which is an isosceles triangle and its bottom edge is on the X-axis. The half of the top angle of the triangle is Zi degrees. (See the below figure) You have an aircraft which can fly on a fixed height. Because of some unknown reasons, this aircraft can fly only under the light. Your task is to find the maximum possible height for your flight from X=L to X=R. The lights do not block the aircraft, e.g., the aircraft can safely fly through a light. Develop a C++ program that solve the above problem, sample input output is listed below.

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Author:James Kurose, Keith Ross
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There are N lights above a road along the X-axis. The i-th light has Xi as
its X-coordinate, and it is hung Yi above the road. The i-th light illuminates
a triangular area, which is an isosceles triangle and its bottom edge is on
the X-axis. The half of the top angle of the triangle is Zi degrees. (See the
below figure)
You have an aircraft which can fly on a fixed height. Because of some
unknown reasons, this aircraft can fly only under the light. Your task is to
find the maximum possible height for your flight from X=L to X=R.
The lights do not block the aircraft, e.g., the aircraft can safely fly through
a light. Develop a C++ program that solve the above problem, sample input
output is listed below.
i-th light
Yi
valid flight
road
Xi
Develop a C++ program that solve the above problem.
Input:
2 3.2 7.3
3.2 4.7 28
7.3 4.2 75
Output:
3.300759642
Transcribed Image Text:There are N lights above a road along the X-axis. The i-th light has Xi as its X-coordinate, and it is hung Yi above the road. The i-th light illuminates a triangular area, which is an isosceles triangle and its bottom edge is on the X-axis. The half of the top angle of the triangle is Zi degrees. (See the below figure) You have an aircraft which can fly on a fixed height. Because of some unknown reasons, this aircraft can fly only under the light. Your task is to find the maximum possible height for your flight from X=L to X=R. The lights do not block the aircraft, e.g., the aircraft can safely fly through a light. Develop a C++ program that solve the above problem, sample input output is listed below. i-th light Yi valid flight road Xi Develop a C++ program that solve the above problem. Input: 2 3.2 7.3 3.2 4.7 28 7.3 4.2 75 Output: 3.300759642
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