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: Accepted)

#include<bits/stdc++.h>
using namespace std;
#define debug(x) cout << #x << " " << x << endl
inline void filehandling()
{
  #ifndef ONLINE_JUDGE
  freopen("input.txt", "r", stdin);
  freopen("output.txt", "w", stdout);
  #endif
}
#define int long long
#define MOD 1000000007
int power(int x,int y)
{
  int res = 1LL ;
  while(y > 0)
  {
    if(y & 1)
    {
      res = ((res % MOD) * (x % MOD)) % MOD;
    }
      
      y >>= 1 ;
      x = ( (x % MOD) * (x % MOD) ) % MOD;
  }

  return res % MOD;
} 
void Solve_Case()
{
   int r;
   cin >> r;
   cout << r*r;
}
signed main()
{
  // filehandling();
   int TestCases = 1;
  // cin >> TestCases;
   while(TestCases--)
   {
      Solve_Case();
   }
}