John, Bruce and juice

Input

The first line of input contains John's amount of money. The second line contains Bruce's amount of money. The third line contains the price of a bottle of juice. Each amount or price is represented by a non-empty integer part, a decimal point, and exactly two digits after the point. Each (John's and Bruce's) amount of money is non-negative and strictly less than $1000000.00$. Juice is not free and costs strictly less than $1000.00$.

Output

Your program should output exactly one integer: the maximum number of bottles the guys can buy by pooling their money together.

Examples