### Problem Statement

At a certain company, a worker is paid an hourly rate of P1 dollars for the first 200 hours he works each month. He is paid an hourly rate of P2 dollars for the remaining hours. Return the minimum number of hours he must work this month to earn salary dollars.

### Definition

 Class: SalaryCalculator Method: calcHours Parameters: int, int, int Returns: double Method signature: double calcHours(int P1, int P2, int salary) (be sure your method is public)

### Notes

-Your return value must have an absolute or relative error less than 1e-9.

### Constraints

-P1 will be between 1 and 100, inclusive.
-P2 will be between 1 and 100, inclusive.
-salary will be between 1 and 1,000,000, inclusive.

### Examples

0)

 `10` `15` `1000`
`Returns: 100.0`
 The worker is paid 10 dollars per hour for the first 200 hours, and 15 dollars per hour for any hours beyond that. To earn 1000 dollars, he only needs to work 100 hours at 10 dollars per hour.
1)

 `10` `15` `3000`
`Returns: 266.6666666666667`
 The worker is paid 10 dollars per hour for the first 200 hours for a total of 2000 dollars. To earn the extra 1000 dollars, he must work approximately 66.67 hours at 15 dollars per hour.
2)

 `100` `1` `1000000`
`Returns: 980200.0`
 The company does not like to pay for overtime work.
3)

 `17` `23` `973546`
`Returns: 42380.260869565216`
4)

 `82` `8` `12140`
`Returns: 148.0487804878049`

#### Problem url:

http://www.topcoder.com/stat?c=problem_statement&pm=6822

#### Problem stats url:

http://www.topcoder.com/tc?module=ProblemDetail&rd=10005&pm=6822

Andrew_Lazarev

#### Testers:

PabloGilberto , brett1479 , Yarin , Olexiy

Simple Math