Var
 f:file of Real;
 i,N:Byte;
 A,Max,Min,First,Last:Real;

Begin
 Randomize;
 N:=50+Random(100);
 Assign(f,'D:\xxx');
 Rewrite(f);
 For i:=1 to N do
  begin
   A:=(Random-0.3)*100;
   Write(f,A);
  end;
 Close(f);
 Reset(f);
 Read(f,First);
 Min:=First;
 Max:=First;
 Repeat
  if not EoF(f) then
   begin
    Read(f,Last);
    If Last>Max then Max:=Last;
    If Last<Min then Min:=Last;
   end;
 Until EoF(f);
 Close(f);
 Writeln('Max-Min = ',Max-Min:0:3);
 Writeln('(First+Last)/2 = ',(First+Last)/2:0:3);
 If (Max-Min)=((First+Last)/2) then
  Writeln('Coincides!')
 else
  Writeln('Not coincides!');
 Readln
End.