#include <stdio.h>
#include <math.h>
int main() {
  double r;
  double s;
  r = 2.0;
  s = sqrt(r);
  printf("%f\n", s);
  r = 3.141592653589793238462;
  s = sqrt(r);
  printf("%f\n", s);
  return 0;
}
/* end */