Program PerevodChisla;
function Dec2Bin(decim: integer): string;
var binar: string[255];
begin
while decim > 0 do
begin
if Decim mod 2 = 0 then
binar := '0' + binar
else
binar := '1' + binar;
decim := decim div 2;
end;
Dec2Bin := binar;
end;
var a:integer;
begin
readln(a);
writeln(Dec2Bin(a));
end.
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