gwcc2p1

G.W. Coding Contest 2 P1: Nevin's Cookies

Nevin is baking cookies for his friends. Each of his friends want a different sized cookie, so he works hard to cater to their requests. He has some perfectly circular cookie cutters labelled with their radius (1 cm, 2 cm, ...), and each of his $N$ friends can choose which cookie cutter size they want for their cookie. How much cookie dough does Nevin need to buy in total, rounded down to the nearest integer? Use 3.14 for $\pi$ .

Note: The answer should be rounded down, intermediate calculations should always remain as decimals to maintain accuracy.

Input Specification:

The first line of input will contain an integer, $N$ .

The next $N$ lines will contain an integer, representing the radius of a cookie cutter.

Output Specification:

The output will consist of a single integer, representing the amount of cookie dough in cm ², that Nevin needs to buy.

TIME CONSTRAINT: 1s

Sample Input 1:

3
1
1
1

Sample Output 1:

Explanation for Sample Input 1:

There are 3 cookies of radius 1. The total dough needed is

3.14*1^2 + 3.14*1^2 + 3.14*1^2 = 9.42 = 9

Sample Input 2:

2
2023
1967

Sample Output 2:

24999480

Explanation for Sample Input 2:

There are 2 cookies. The total dough needed is

3.14*2023^2 + 3.14*1967^2 = 24999480.52 = 24999480