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 C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <iostream>
 
using namespace std;
 
int main()
{
   int n;
   string s,t,d;
   cin>>n;
   cin>>s;
  if(n==1)
    cout<<"No";
    
  else
  {
    for(int i=0;i<(n/2);i++)
   {
       t[i]=s[i];
   }
   int j=0;
    for(int i=n/2;i<n;i++)
   {
       d[j]=s[i];
       j++;
   }
   if(t==d)
   cout<<"Yes";
   else
   cout<<"No";
  }
   
 
   return 0;
}