#include <iostream>
#include <cstdio>
#include <cassert>
#include <cstdlib>
#include <fstream>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <set>
#include <queue>
#include <stack>
#include <map>
#include <bitset>
#include <ctime>

#define sqr(a) ((a) * (a))
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define ppb pop_back
#define add insert
#define del erase
#define sz(a) (int)a.size()
#define forit(i, a) for(__typeof(a.begin()) i = a.begin(); i != a.end(); i++)

using namespace std;

typedef long long LL;
typedef vector<int> Vi;
typedef set<int> Si;
typedef pair<int, int> Pii;

//const double EPS = 1e-9;
//const double PI = acos(-1.0);
//const int MAX_N = (int)1e5;

LL sumOfGroup(LL k) {
    return k * k * k;
}

int main()
{
    LL k;
    cin >> k;
    cout << sumOfGroup(k);
    
    return 0;
}