object Solution {

    
    def sumOfGroup(k: Long): Long =  {
        // Return the sum of the elements of the k'th group.
        
       return k*k*k;
        
    }

    def main(args: Array[String]) {
        val sc = new java.util.Scanner (System.in);
        var k = sc.nextInt();
        val answer = sumOfGroup(k);
        println(answer)
    }
}