Problem:
Score : 100 points

Problem Statement

Given is an integer r.

How many times is the area of a circle of radius r larger than the area of a circle of radius 1?

It can be proved that the answer is always an integer under the constraints given.

Constraints

1 \leq r \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

r

Output

Print the area of a circle of radius r, divided by the area of a circle of radius 1, as an integer.

Sample Input 1

2

Sample Output 1

4

The area of a circle of radius 2 is 4 times larger than the area of a circle of radius 1.

Note that output must be an integer - for example, 4.0 will not be accepted.

Sample Input 2

100

Sample Output 2

10000

Solution in JavaScript (node.js v5.12) (judge verdict: Wrong Answer)

function main(input){
    var tmp = input.split('\n');
    var n = parseInt(tmp[0]);
    var s = tmp[1];
    if(n%2==0){
        var t = s.slice(0,n/2-1);
        if(t[0]==t[1]){
            console.log("Yes");
        }else{
            console.log("No");
        }
    }else{
        console.log("No");
    }
}
main(require("fs").readFileSync("/dev/stdin", "utf8"));