You are provided with a number "N", Find the Nth term of the series: 1, 4, 9, 25, 36, 49, 64, 81, .......

You are provided with a number "N", Find the N^th term of the series: 1, 4, 9, 25, 36, 49, 64, 81, .......

(Print "Error" if N = negative value and 0 if N = 0).

Input Description:
An integer N is provided to you as the input.

Output Description:
Find the Nth term in the provided series.

Sample Input :
18

Sample Output :
324

 const readline = require('readline');
 const inp = readline.createInterface({
  input: process.stdin
 });
 const userInput = [];
 inp.on("line", (data) => {
 userInput.push(data);
 });
 inp.on("close", () => {
 var data = userInput[0].split(" ");
 var a = parseInt(data[0]);
 
 console.log(a*a);
 });