using System;
 
class P
{
    static void Main()
    {
  //input = input.split('\n');
  //var firstLine = input[0];
  var firstLine = int.Parse(Console.ReadLine());
  //s = firstLine[0].split('');
  //t = input[1].split('');
  //var n = 0;
 Console.WriteLine(firstLine * firstLine);
  
  }
}