Fraschetti's Parachute

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Points: 3

Time limit: 1.0s

Memory limit: 24M

Author:

Henry_Zhang

Problem type

After losing a bet with Mr. Carullo, Mr. Fraschetti must jump off the CN Tower and fall freely for several seconds before releasing his parachute. His height can be modeled by the function $h = -4.9t^2 + t + 360$ ~h = -4.9t^2 + t + 360~ before releasing his parachute and $h = -4t + b$ ~h = -4t + b~ after he releases it where $h$ ~h~ is his height, in meters, $t$ ~t~ seconds after jumping. Given $b$ ~b~, how long after jumping did Mr. Fraschetti wait before releasing his parachute?

Input Specification

The first line will contain the integer $b$ ~b~ $(b \le 361)$ ~(b \le 361)~.

Output Specification

Output the amount of time in seconds rounded to one decimal place.

Sample Input

Sample Output

7.2

Comments

8

Henry_Zhang commented on March 6, 2020, 11:21 a.m. ← edit 3 →

bruh