function rN(a:longint):longint;
var
i:longint;
begin
i:=0;
while a > 0 do begin
i:=i * 10 + a mod 10;
a:=a div 10;
end;
rN:=i;
end;
var
b: longint;
begin
readln(b);
writeln(rN(b));
end.
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