#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

unsigned long long int sumOfGroup(long int k) {
    return k*k*k;
}

int main() {
    long k; 
    scanf("%ld", &k);
    unsigned long long int answer = sumOfGroup(k);
    printf("%llu\n", answer);
    return 0;
}