#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(void)
{
    int n=1;
    float sum,x,q,f;
    
    printf("print -1<=x<=1\n\n");
    scanf("%f", &x);
    
    if ((x<=1)&&(x>=-1))
{   while(q<(1e-4))
q=1/n;
sum=(pow(-1,n)*pow(x,2n))/(1*(2n-n)*2n);
n++;
printf("\n%f %f\n",q,sum);
}
 
  system("PAUSE");	
  return 0;
}