URI 1015 solution

#include <stdio.h>

int main()

 {

      double x1,x2,y1,y2,Distance;

      scanf("%lf %lf",&x1,&y1);

      scanf("%lf %lf",&x2,&y2);

      Distance=sqrt(pow((x2-x1),2)+(pow((y2-y1),2)));

       printf("%.4lf
",Distance);

    return 0;

}