foo.cc: In function ‘int main()’:
foo.cc:7:21: error: no match for ‘operator>>’ (operand types are ‘std::ostream’ {aka ‘std::basic_ostream<char>’} and ‘int’)
    7 |                 cout>>2;
      |                 ~~~~^~~
      |                 |     |
      |                 |     int
      |                 std::ostream {aka std::basic_ostream<char>}
foo.cc:7:21: note: candidate: ‘operator>>(int, int)’ (built-in)
    7 |                 cout>>2;
      |                 ~~~~^~~
foo.cc:7:21: note:   no known conversion for argument 1 from ‘std::ostream’ {aka ‘std::basic_ostream<char>’} to ‘int’
In file included from stdc++.h:41:
/nix/gcc-13.2.0/include/c++/13.2.0/cstddef:130:5: note: candidate: ‘template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator>>(byte, _IntegerType)’
  130 |     operator>>(byte __b, _IntegerType __shift) noexcept
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/cstddef:130:5: note:   template argument deduction/substitution failed:
foo.cc:7:17: note:   cannot convert ‘std::cout’ (type ‘std::ostream’ {aka ‘std::basic_ostream<char>’}) to type ‘std::byte’
    7 |                 cout>>2;
      |                 ^~~~
In file included from /nix/gcc-13.2.0/include/c++/13.2.0/string:55,
                 from /nix/gcc-13.2.0/include/c++/13.2.0/bitset:52,
                 from stdc++.h:52:
/nix/gcc-13.2.0/include/c++/13.2.0/bits/basic_string.tcc:821:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&)’
  821 |     operator>>(basic_istream<_CharT, _Traits>& __in,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/basic_string.tcc:821:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bitset:1593:5: note: candidate: ‘template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, bitset<_Nb>&)’
 1593 |     operator>>(std::basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bitset:1593:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
In file included from /nix/gcc-13.2.0/include/c++/13.2.0/istream:1106,
                 from /nix/gcc-13.2.0/include/c++/13.2.0/sstream:40,
                 from /nix/gcc-13.2.0/include/c++/13.2.0/complex:45,
                 from /nix/gcc-13.2.0/include/c++/13.2.0/ccomplex:39,
                 from stdc++.h:127:
/nix/gcc-13.2.0/include/c++/13.2.0/bits/istream.tcc:975:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT&)’
  975 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/istream.tcc:975:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/istream:846:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char&)’
  846 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/istream:846:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/istream:851:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char&)’
  851 |     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/istream:851:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/istream:893:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT*)’
  893 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/istream:893:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/istream:936:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char*)’
  936 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/istream:936:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/istream:942:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char*)’
  942 |     operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/istream:942:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<char, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/istream:1096:5: note: candidate: ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&)’
 1096 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/istream:1096:5: note:   template argument deduction/substitution failed:
/nix/gcc-13.2.0/include/c++/13.2.0/istream: In substitution of ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ostream<char>&; _Tp = int]’:
foo.cc:7:9:   required from here
/nix/gcc-13.2.0/include/c++/13.2.0/istream:1096:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’
/nix/gcc-13.2.0/include/c++/13.2.0/complex:504:5: note: candidate: ‘template<class _Tp, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, complex<_Tp>&)’
  504 |     operator>>(basic_istream<_CharT, _Traits>& __is, complex<_Tp>& __x)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/complex:504:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
In file included from stdc++.h:143:
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:73:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Resetiosflags)’
   73 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:73:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:103:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setiosflags)’
  103 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:103:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:134:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setbase)’
  134 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:134:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:172:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setfill<_CharT>)’
  172 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:172:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:202:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setprecision)’
  202 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:202:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:232:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Setw)’
  232 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:232:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:266:5: note: candidate: ‘template<class _CharT, class _Traits, class _MoneyT> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Get_money<_MoneyT>)’
  266 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:266:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:420:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _Get_time<_CharT>)’
  420 |     operator>>(basic_istream<_CharT, _Traits>& __is, _Get_time<_CharT> __f)
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/iomanip:420:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
In file included from /nix/gcc-13.2.0/include/c++/13.2.0/valarray:605,
                 from stdc++.h:166:
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)’
  414 |     _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)’
  414 |     _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
  414 |     _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)’
  414 |     _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
  414 |     _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/valarray_after.h:414:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   mismatched types ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ and ‘int’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/valarray:1199:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const valarray<_Tp>&, const valarray<_Tp>&)’
 1199 | _DEFINE_BINARY_OPERATOR(>>, __shift_right)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/valarray:1199:1: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::valarray<_Tp>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/valarray:1199:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)’
 1199 | _DEFINE_BINARY_OPERATOR(>>, __shift_right)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/valarray:1199:1: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::valarray<_Tp>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/valarray:1199:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)’
 1199 | _DEFINE_BINARY_OPERATOR(>>, __shift_right)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/valarray:1199:1: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   mismatched types ‘const std::valarray<_Tp>’ and ‘int’
    7 |                 cout>>2;
      |                       ^
In file included from /nix/gcc-13.2.0/include/c++/13.2.0/random:53,
                 from stdc++.h:179:
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:927:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, uniform_int_distribution<_IntType>&)’
  927 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:927:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:988:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, uniform_real_distribution<_IntType>&)’
  988 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:988:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2165:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, cauchy_distribution<_RealType>&)’
 2165 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2165:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
In file included from /nix/gcc-13.2.0/include/c++/13.2.0/random:51:
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.h:3830:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, bernoulli_distribution&)’
 3830 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.h:3830:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1130:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, geometric_distribution<_IntType>&)’
 1130 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1130:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1781:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, exponential_distribution<_RealType>&)’
 1781 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1781:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2559:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, weibull_distribution<_RealType>&)’
 2559 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2559:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2633:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, extreme_value_distribution<_RealType>&)’
 2633 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2633:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:177:5: note: candidate: ‘template<class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, linear_congruential_engine<_UIntType, __a, __c, __m>&)’
  177 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:177:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:504:5: note: candidate: ‘template<class _UIntType1, long unsigned int __w1, long unsigned int __n1, long unsigned int __m1, long unsigned int __r1, _UIntType1 __a1, long unsigned int __u1, _UIntType1 __d1, long unsigned int __s1, _UIntType1 __b1, long unsigned int __t1, _UIntType1 __c1, long unsigned int __l1, _UIntType1 __f1, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>&)’
  504 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:504:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:656:5: note: candidate: ‘template<class _UIntType, long unsigned int __w, long unsigned int __s, long unsigned int __r, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, subtract_with_carry_engine<_UIntType, __w, __s, __r>&)’
  656 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:656:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:723:5: note: candidate: ‘template<class _RandomNumberEngine, long unsigned int __p, long unsigned int __r, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, discard_block_engine<_RandomNumberEngine, __p, __r>&)’
  723 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:723:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:887:5: note: candidate: ‘template<class _RandomNumberEngine, long unsigned int __k, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, shuffle_order_engine<_RandomNumberEngine, __k>&)’
  887 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:887:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1245:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, negative_binomial_distribution<_IntType>&)’
 1245 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1245:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1455:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, poisson_distribution<_IntType>&)’
 1455 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1455:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1722:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, binomial_distribution<_IntType>&)’
 1722 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1722:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1943:5: note: candidate: ‘template<class _RealType1, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, normal_distribution<_RealType>&)’
 1943 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:1943:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2008:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, lognormal_distribution<_RealType>&)’
 2008 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2008:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2079:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, chi_squared_distribution<_RealType>&)’
 2079 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2079:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2241:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, fisher_f_distribution<_RealType>&)’
 2241 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2241:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2314:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, student_t_distribution<_RealType>&)’
 2314 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2314:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2484:5: note: candidate: ‘template<class _RealType1, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, gamma_distribution<_RealType>&)’
 2484 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2484:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2792:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, discrete_distribution<_IntType>&)’
 2792 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2792:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2999:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, piecewise_constant_distribution<_RealType>&)’
 2999 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:2999:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:3205:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, piecewise_linear_distribution<_RealType>&)’
 3205 |     operator>>(std::basic_istream<_CharT, _Traits>& __is,
      |     ^~~~~~~~
/nix/gcc-13.2.0/include/c++/13.2.0/bits/random.tcc:3205:5: note:   template argument deduction/substitution failed:
foo.cc:7:23: note:   ‘std::ostream’ {aka ‘std::basic_ostream<char>’} is not derived from ‘std::basic_istream<_CharT, _Traits>’
    7 |                 cout>>2;
      |                       ^