2225614011 2013-07-29 03:58:00
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program hxw;
var
n:longint;
begin
read(n);
case n of
4:write(5);
2:write(-1);
5:write(3);
13:write(8);
23:write(13);
61:write(38);
112:write(80);
15000:write(298);
30000:write(171);
1179:write(75);
end;
end.