import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
    // 1, 3 5, 7 9 11, 13 15 17 19, 21 23 25 27 29, 31 33 35 37 39 41, 43 45 47 49
    //51 53 55, 57 59 61 63 65 67 69 71, 73 75 77 79 81 83 85 87 89, 91 93 95 97 99
    //101 103 105 107 109, 111 113 115 117 119 121 123 125 127 129 131, 133 135 137
    //139 141 143 145 147 149 151 153 155, 157 159 161 163 165 167 169 171 173 175 177 
    //179 181, 183 185 187 189 191 193 195 197 199 201 203 205 207 209, 211 213 215 217 219 
    //221 223 225 227 229 231 233 235 237 239, 241 243 245 247 249 251 253 255 257 259 261 
    //263 265 267 269 271,

    static long sumOfGroup(int k) {
        // Return the sum of the elements of the k'th group.
        long converted = (long)k;
        return converted*converted*converted;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int k = in.nextInt();
        long answer = sumOfGroup(k);
        System.out.println(answer);
        in.close();
    }
}