#!/bin/python3

import sys

def sumOfGroup(k):
    # Return the sum of the elements of the k'th group.
    #list1 = [i for i in range(1, 10**4) if i%2 == 1 ]
    '''
    if(k == 1):
        return list1[0]
    elif(k == 2):
        return sum(list1[1:3])
    else:
        return list1[k:k+k]
    '''
    return (k**3)
    #return (list1)
    

if __name__ == "__main__":
    k = int(input().strip())
    answer = sumOfGroup(k)
    print(answer)