Program Z;
Var
F:File of integer;
X,Xs,Kol:integer;
Seria:boolean;
begin
Assign(F,'C:\Ser.txt');
{$I-}
Reset(F);
{$I+}
Read(F,Xs);
Seria:=False;
Kol:=0;
While not eof(F) do
begin
Read(F,X);
If (X=Xs) and (not Seria) then
begin
Seria:=True;
Kol:=Kol+1;
end;
If X<>Xs then
begin
Read(F,Xs);
Seria:=False;
end;
End;
Close(F);
write(Kol);
end.