int main() {
    printf("%f\n", (.5 + (.5 + (.5)/2)/2));
    printf("%f\n", .5 + (.5 + (.5 + (.5)/2.0)/2.0)/2.0);
    printf("%f\n", (2.0*(2.0*(2.0*(2.0*(2.0*1.0 + 0) + 1.0)+ 1.0) + 0) + 0)
		+ (0 + (0 + (1.0/2.0 + (1.0/2.0 + (0 + 1.0/2.0/2.0)/2.0)/2.0)/2.0)/2.0));

}