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

long int sumOfGroup(int k) {
    
    long int n;
    int i;
    long int cnt =1;
   /*
    n = k*(k-1)+1;
    
    for(i=0;i<k;i++){        
        cnt = n+cnt;
        n = n+2;
    }
    */
   for(i=0;i<3;i++){
     cnt=cnt*k;  
   }
    
    return cnt;
    
    
    // Return the sum of the elements of the k'th group.
}

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