Given the number of people that recover per day recovers, the number of new cases per day newCases, and the number of currently active cases activeCases, write a function to calculate the number of days needed to reach zero active cases.

Examples

endCorona(4000, 2000, 77000) ➞ 39

endCorona(3000, 2000, 50699) ➞ 51

endCorona(30000, 25000, 390205) ➞ 79

Notes

• The number of people who recover per day recovers will always be greater than daily newCases.
• Be conservative and round up the number of days needed.