
ZOJ Problem Set  1347
For the manager of a theatre, setting the price of a ticket is a rather delicate matter. Suppose that a theatre has n (<= 1000000) seats, and that if you give away the tickets for free, all the seats will be taken. After some sort of investigation, it is estimated that for every p yuans of increase of the ticket price, the theatre will lose m audiences. But the audiences will not leave until the ticket price jumps up a complete step of p yuans. For example, if given p=1.00 and m=10, no audience will be lost if the price is set to be 0.99 yuans, and 10 will be lost if the price is 1.99 yuans. It costs R yuans for the theatre to run each show, and S yuans to serve each of the audiences during each show. Now your job is to write a program to maximize the total revenue of each show for the theatre. 2 1000 0.10 10 1000 2.00 100 0.50 2 500 2.0 Sample Output price = 6.09 audiences = 400 revenue = 636.00 price = 13.99 audiences = 46 revenue = 51.54 Source: Zhejiang University Local Contest 2002 