it's my code:
------------------------------
{deleted}
------------------------------


Edited by author 09.12.2006 21:18

#include<iostream>
#include<fstream>
#include<sstream>
#include<vector>
#include<cmath>
#include<queue>
#include<string>
#include<iomanip>

using namespace std;

int main(){

    //1084
    double glength,r;

    double pi = 3.1415926535897932384626433832795;

    cin>>glength>>r;

    cout<<setiosflags(ios::fixed)<<setiosflags(ios::showpoint)<<setprecision(3);

    if(glength >= r * 2.0){
        cout<<r*r*pi<<endl;
        return 0;
    }
    if(glength * pow(2.0,0.5) <= r){
        cout<<glength*glength<<endl;
        return 0;
    }
    else{
        double d = pow((pow(r,2.0) - pow(glength/2.0,2.0)),0.5);
        double area = glength/2.0 * d/2.0;
        double arc = pi/4.0 - acos(0.5*glength/r);
        cout<< 8.0*(0.5*arc*r*r+area)<<endl;
        return 0;
    }

}

#include<iostream.h>
#include<math.h>
int main()
{
    double pi;
    double l, r,alpha,segm,treug,delta;
    cin>>l>>r;
    pi=3;
    l/=2;
    if(r<=l/2)
        cout<<pi*r*r;
    if(r>(l*sqrt(2)))
        cout<<l*l*4;
    else
    {
        alpha=2*acos(l/r);
        segm=pi*r/(2*alpha);
        treug=l*sqrt(((r*r)-(l*l)));
        delta=segm-treug;
        cout<<pi*r*r-4*delta;
    }
    return 0;
}

#include<stdio.h>
#include<math.h>
#define pi 3.14159265
int main()
{ int l,r;
  double result,angle;
  scanf("%d%d",&l,&r);
  if((double)l-sqrt(2)*r<1e-6)
    result=1.0;
  else if((double)l/2.0-(double)r>-1e-6)
    result=pi*r*r/(double)(l*l);
  else
  { angle=acos(l/2.0/r);
    result=((pi-4*angle)*r*r+2*l*r*sin(angle))/(double)(l*l);
  }
  printf("%.3lf\n",result*100.0);

  return 0;
}

const p=3.1415926535897932384626433832795;
var arccos,x,as,at,ah,a,b,l,r:real;

begin
read(l,r);
if r>=l*sqrt(2) then
  writeln(l*l:0:3)
else
  if r<=l / 2 then
    writeln(p*r*r:0:3)
  else
    begin

      x:=l/(2*r);
      b:=l/2;
      ArcCos := ArcTan (sqrt (1-sqr (x)) /x);
      as:=arccos*r*r;
      at:=b*sqrt(r*r-b*b);
      ah:=as-at;
      a:=p*r*r;
      a:=a-4*ah;
      writeln(a:0:3);
    end;
end.


i tested it with BP 7.0 and FP 1.0.10 both on windows... what's wrong?

I am solving this problem with recursion.

I divide square into 4 peaces and recurse on them, if they
are in circle. so on...

but I got Wrong Answer on 7 test.
can you send me sophisticated tests.

and tell me your algorith too.

if you use #include<math.h> you get CE if you use sqrt(2);//or any other integer

in C++ use sqrt(2.0); //sqrt(2); ==> COMPILATION ERROR
in C it is ok to use sqrt(2);

I hope I helped you..
Good luck and Have fun ! :D

#include <stdio.h>
#include <math.h>
void main(){
double r,a,s,angl,cosa;
scanf("%lf %lf",&a,&r);
if (2*r<a) s=M_PI*r*r;
else if (sqrt(2)*r>a) s=a*a;
else{
  cosa=a/(2*r);
  angl=2*acos(cosa);
  angl=M_PI/2-angl;
  s=((a/2)*sqrt(r*r-(a*a)/4))+angl*r*r/2;
  }
printf("%.3lf\n",4*s);
}

#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

int main()
{
    long double x,y;
    cout <<setprecision(3)<<fixed<<showpoint;
    const long double pi=3.1416;
    cin >>x>>y;
    if(x/2<y)
    {
        if(sqrt(2.0)*x<=y) cout <<x*x<<endl;
        else
        {
            cout <<y*y*pi-(y*y*acosl(x/2/y)-sqrtl(y*y-x*x/4)*x/2)*4 <<endl;

        }
    }
    else cout <<y*y*pi<<endl;
    //system("pause");
    return 0;
}

//There seams to be a problem with your C++ compiler.
//It doesn't support #include<math.h>
//In many problems I tried to use MATH.H, but I always got //COMPILATION ERROR.
//Please take my notice into consideration and fix, if //possible, the problem.

Thank you.
I solved the problem. :D
Look at my other post to see the solution. :D

Edited by author 09.04.2005 15:27


Edited by author 10.04.2005 17:21

r:real;
writeln (r:3:3);

IS THIS GOD OR NOT

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

void main()
{

    double a,b,s;
    scanf("%lf%lf",&a,&b);
    if((a==0)||(b==0)){
        s=0;
        printf("%.3lf",s);
        return;
    }else if(b-1.4142*a>=1e-4){
        s=a*a;
    }else if(b-a/2<=1e-4){
        s=3.1416*b*b;
    }else{
        double alfa=2*acos(a/(2*b));
        double s1=b*b*alfa/2-b*b*sin(alfa)/2;
        s=3.1416*b*b-4*s1;
    }
    printf("%.3lf\n",s);
}

David Why do you use 'uses math'?

uses math;
const p=3.14; {   -> p = pi , it will more accurate}
var a,r:integer;
    s,angl,cosa:real;
begin
  readln (a,r);
  if (2*r<a) then
    s:=p*r*r
  else
    if (sqrt(2)*r>a) then
      s:=a*a
    else
      begin
        cosa:=a/(2*r);
        angl:=2*arctan(cosa);
        angl:=p/2-angl;
        s:=((a/2)*sqrt(r*r-(a*a)/4))+angl*r*r/2;
        s := s * 4;
      end;
   writeln (s:10:3);
end.

uses math;
const p=3.14;
var a,r:integer;
    s,angl,cosa:real;

begin
  readln (a,r);
  if (2*r<a) then
    s:=p*r*r
  else
    if (sqrt(2)*r>a) then
      s:=a*a
    else
      begin
        cosa:=a/(2*r);
        angl:=2*arccos(cosa);
        angl:=p/2-angl;
        s:=((a/2)*sqrt(r*r-(a*a)/4))+angl*r*r/2;
      end;
  writeln (s*4:3:3);
end.

I've solved the problem but it returns me "Wrong Answer"
I've checked my answers on my PC and everything was correct!
So please tell me how exactly to write the input and output.