Main.cc: In function ‘int main()’:
Main.cc:47:41: error: wrong number of template arguments (0, should be 1)
sort(s + 1, s + n + 1, greater <>());
^
In file included from /usr/include/c++/7/string:48:0,
from /usr/include/c++/7/bits/locale_classes.h:40,
from /usr/include/c++/7/bits/ios_base.h:41,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/istream:38,
from /usr/include/c++/7/sstream:38,
from /usr/include/c++/7/complex:45,
from /usr/include/c++/7/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
from Main.cc:2:
/usr/include/c++/7/bits/stl_function.h:371:12: note: provided for ‘template struct std::greater’
struct greater : public binary_function<_Tp, _Tp, bool>
^~~~~~~
Main.cc:43:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%s\n%lld", s + 1, &k);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~