/* Godzio 8 */

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


void show_u(int n, double a) {
    double u = sqrt(n + a*sqrt(n) + 1) - sqrt(n);
    printf("dla a = %lf: u(%d) = %lf\n", a, n, u);
}

int main (void) {
    int infinity = 999999999;
    double a;

    for (a=0.5; a<=4; a *= 2)
        show_u(infinity, a);

    return 0;
}