Evaluate a Polynomial

Problem Background

Special for beginners, ^_^

Problem Description

For the polynomial $f(x)=ax^3+bx^2+cx+d$ and given $a, b, c, d, x$, compute the value of $f(x)$.

Input Format

A single line containing $5$ real numbers: $x$, and the values of the parameters $a, b, c, d$. Each number is a double-precision floating-point number with absolute value not exceeding $100$. The numbers are separated by a single space.

Output Format

A single real number, the value of $f(x)$, kept to 7 decimal places.

Sample Input

2.31 1.2 2 2 3

Sample Output

33.0838692

Constraints

Time limit: 1s, memory limit: 1024KiB for each test case.

Hint

• The five numbers on one line are all real numbers, and the first one is $x$ — do not reverse the reading order.
• Plug into the formula in the statement and keep 7 decimal places.
• Verify with the sample: 2.31 1.2 2 2 3 → 33.0838692.