uses crt;
var e,t,s:real;
n:integer;
begin
clrscr;
e:=0.01;
s:=1;
t:=1;
n:=1;
while t>e do
begin
n:=n+1;
t:=1/(2*n-1);
s:=s+t;
end;
write('S=',s:0:3);
readln
end.
uses crt;
var e,t,s:real;
n:integer;
begin
clrscr;
e:=0.01;
s:=1;
t:=1;
n:=1;
while t>e do
begin
n:=n+1;
t:=1/(2*n-1);
s:=s+t;
end;
write('S=',s:0:3);
readln
end.