program exam14;var x:integer;beginreadln(x);if x>0 then writeln('zhengshu') else if x<0 then writeln('fushu') else writeln('0');end.program exam14;var x:integer;beginreadln(x);if x>=0 then if x>0 then writeln('zhengshu') else writeln('0') else writeln('fushu');end.