Exercise1
Each day a plant is growing by upSpeed meters. Each night that plant's height decreases by downSpeed meters due to the lack of sun heat. Initially, plant is 0 meters tall. We plant the seed at the beginning of a day. We want to know when the height of the plant will reach a certain level.
Example For upSpeed = 100, downSpeed = 10 and desiredHeight = 910, the output should be 10.
After day 1 --> 100 After night 1 --> 90 After day 2 --> 190 After night 2 --> 180 After day 3 --> 280 After night 3 --> 270 After day 4 --> 370 After night 4 --> 360 After day 5 --> 460 After night 5 --> 450 After day 6 --> 550 After night 6 --> 540 After day 7 --> 640 After night 7 --> 630 After day 8 --> 730 After night 8 --> 720 After day 9 --> 820 After night 9 --> 810 After day 10 --> 910 For upSpeed = 10, downSpeed = 9 and desiredHeight = 4, the output should be 1.
Because the plant reach to the desired height at day 1(10 meters).
After day 1 --> 10 Input/Output [input] integer upSpeed
A positive integer representing the daily growth.
Constraints: 5 ≤ upSpeed ≤ 100.
[input] integer downSpeed
A positive integer representing the nightly decline.
Constraints: 2 ≤ downSpeed < upSpeed.
[input] integer desiredHeight
A positive integer representing the threshold.
Constraints: 4 ≤ desiredHeight ≤ 1000.
[output] an integer
The number of days that it will take for the plant to reach/pass desiredHeight (including the last day in the total count).