Stranded on an island, Tusk decides to launch a signalling flare, but forgets to angle it towards the water. As a result, it takes off perpendicular to the ground. Its height
If Ange launches the flare from the ground where
Input Specification
A single integer,
Output Specification
The time elapsed until the flare touches the ground, i.e. the value of
Sample Input
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10
Sample Output
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2.040816
Explanation of Output for Sample Input
Substituting in
Here is a displacement-time graph of the flare:
Comments
First paragraph says Tusk, second says Ange
Ange launches the flare Tusk prepared.
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