Here is my code :

[Code Deleted]

I checked all test in all of topic and get correct answer.
(Sorry about my bad Eng)

Edited by author 04.07.2007 15:39

Thanks all , I have AC !

My bad program got WA2 on test

-2 6 2 6 0 0 0

AC program give right answer:

6.00
6.32

var X1,Y1,X2,Y2,X3,Y3,L:integer; cosa,cosb,A,B,C,p,H,L1,L2,O1,O2:real;
Begin
 Readln(X1,Y1,X2,Y2,X3,Y3,L);
  A:=SQRT(SQR(X3-X1)+SQR(Y3-Y1));
  B:=SQRT(SQR(X3-X2)+SQR(Y3-Y2));
  C:=SQRT(SQR(X2-X1)+SQR(Y2-Y1));
  p:=(A+B+C)/2;
 If (a=0) or (b=0) then
  Begin
   L1:=0;
   L2:=Abs(A-B);
  end
 else
  If C=0 then
   Begin
    L1:=A;
    L2:=A;
   end
  else
   Begin
    H:=2*SQRT(p*(p-A)*(p-B)*(p-C))/C;
    cosa:=(SQR(A)+SQR(c)-SQR(b))/(2*A*C);
    cosb:=(SQR(B)+SQR(C)-SQR(A))/(2*B*C);
    If (cosa<0) or (cosb<0) then
     If A>=B then L1:=B
     else L1:=A
    else L1:=H;
     If A>=B then
      L2:=A
     else L2:=B;
      end;
 If L>=L1 then O1:=0
 else
  O1:=abs(L1-L);
 If L>=L2 then O2:=0
 else
  O2:=abs(L2-L);
 Writeln(O1:0:2);
 Writeln(O2:0:2);
 Readln;
end.


working

no !!!
my text the same
6.00
6.32
got wa 2 text !!!!
my code:
#include<stdio.h>

#include<math.h>
typedef struct node
{
    double  x,y;
} point;
double max,min;double l;
double dis(point a,point b)
{
    return sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y));
}
bool judge(point a,point b)
{
    double t=a.x*b.x+a.y*b.y;
    return t>=0;
}
void  fun(point a,point b,point c)
{
    double t=(a.y-c.y)*(b.x-c.x)-(b.y-c.y)*(a.x-c.x);
    t=fabs(t);
    // printf("%.3f\n",t);
    t/=sqrt((a.x-b.x)*(a.x-b.x) +(a.y-b.y)*(a.y-b.y));
    max=dis(a,c);
    if(dis(b,c)>max) max=dis(b,c);
    if(max>l) max-=l;
    else max=0;
    point pa,pb,px;px.x=0;px.y=0;
    if(dis(a,px)>dis(b,px))
     {
         pa.x=a.x-b.x;
         pa.y=a.y-b.y;
         pb.x=-b.x;
         pb.y=-b.y;
     }
    else
    {
         pa.x=b.x-a.x;
         pa.y=b.y-a.y;
         pb.x=-a.x;
         pb.y=-a.y;
    }
    if(judge(pa,pb))
    {
         min=t;
        // printf("dskafdk\n");
    }
    else
         min= dis(a,px)>dis(b,px) ? dis(a,px):dis(b,px);
   // printf("%.3f\n",min);
    if(min>l )  min-=l;
    else min=0;
}
int main()
{
    point a,b,c;

    scanf("%lf%lf%lf%lf%lf%lf%lf",&a.x,&a.y,&b.x,&b.y,&c.x,&c.y,&l);
    fun(a,b,c);
    printf("%.2f\n%.2f",min,max);
    return 0;
}