text: #include <stdio.h>
  
  float Q_rsqrt( float number );
  float rsqrt( float number );
  
  int main() {
  	int c;
  	scanf("%d", &c);
  	printf("Quick inverse square root of %d is %f\n", c, Q_rsqrt(c));
  	printf("Standard inverse square root of %d is %f\n", c, rsqrt(c));
  
  	return 0;
  }
  
  