/**********************************************************************/
/* Approximation of the series 1/n^3 by 2 partial sums                */
/**********************************************************************/
#include <math.h>
#include <stdio.h>
int main()
{   float sn=0.0;
    int i,n=2000;

    for (i=1; i<=n; i++) sn+=1.0/(i*i*i);
    printf("\n 1-ere methode, sn=%f\n",sn);
    printf("\n***************************************************\n");
    sn=0.0;
    for (i=n; i>=1; i--) sn+=1.0/(i*i*i);
    printf("\n 2-eme methode, sn=%f\n",sn);
}