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| 10268 | |
| 498-bis | |
| Looking throw the “Online Judge’s Problem Set Archive” I found a very interesting problem number | |
| 498, titled “Polly the Polynomial”. Frankly speaking, I did not solve it, but I derived from it this | |
| problem. | |
| Everything in this problem is a derivative of something from 498. In particular, 498 was “... designed | |
| to help you remember ... basic algebra skills, make the world a better place, etc., etc.”. This problem | |
| is designed to help you remember basic derivation algebra skills, increase the speed in which world | |
| becomes a better place, etc., etc. | |
| In 498 you had to evaluate the values of polynomial | |
| a0xn + a1xn−1 + . . . + an−1x + an. | |
| In this problem you should evaluate its derivative. Remember that derivative is defined as | |
| a0nxn−1 + a1(n −1)xn−2 + . . . + an−1. | |
| All the input and output data will fit into integer, i.e. its absolute value will be less than 231. | |
| Input | |
| Your program should accept an even number of lines of text. Each pair of lines will represent one | |
| problem. The first line will contain one integer - a value for x. The second line will contain a list of | |
| integers a0, a1, ..., an−1, an, which represent a set of polynomial coefficients. | |
| Input is terminated by <EOF>. | |
| Output | |
| For each pair of lines, your program should evaluate the derivative of polynomial for the given value x | |
| and output it in a single line. | |
| Sample Input | |
| 7 | |
| 1 -1 | |
| 2 | |
| 1 1 1 | |
| Sample Output | |
| 1 | |
| 5 |