answer.code:18:12: error: ‘long double y0’ redeclared as different kind of entity
   18 | double x0, y0, x, y, d, t, res;
      |            ^~
In file included from /usr/include/features.h:461,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/c++config.h:679,
                 from /usr/include/c++/13/cassert:43,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:33,
                 from answer.code:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:220:1: note: previous declaration ‘double y0(double)’
  220 | __MATHCALL (y0,, (_Mdouble_));
      | ^~~~~~~~~~
answer.code: In function ‘int main()’:
answer.code:32:24: error: no match for ‘operator>>’ (operand types are ‘std::basic_istream<char>::__istream_type’ {aka ‘std::basic_istream<char>’} and ‘double(double) throw ()’ {aka ‘double(double)’})
   32 |         cin >> n >> x0 >> y0 >> d >> t;
      |         ~~~~~~~~~~~~~~ ^~ ~~
      |                  |        |
      |                  |        double(double) throw () {aka double(double)}
      |                  std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}
In file included from /usr/include/c++/13/sstream:40,
                 from /usr/include/c++/13/complex:45,
                 from /usr/include/c++/13/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:127:
/usr/include/c++/13/istream:325:7: note: candidate: ‘std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]’ (near match)
  325 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/13/istream:325:7: note:   conversion of argument 1 would be ill-formed:
answer.code:32:27: error: invalid conversion from ‘double (*)(double) throw ()’ {aka ‘double (*)(double)’} to ‘void*’ [-fpermissive]
   32 |         cin >> n >> x0 >> y0 >> d >> t;
      |                           ^~
      |                           |
      |                           double (*)(double) throw () {aka double (*)(double)}
answer.code:32:27: error: cannot bind rvalue ‘(void*)y0’ to ‘void*&’
/usr/include/c++/13/istream:201:7: note: candidate: ‘std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]’ (near match)
  201 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/13/istream:201:7: note:   conversion of argument 1 would be ill-formed:
answer.code:32:27: error: invalid conversion from ‘double (*)(double) throw ()’ {aka ‘double (*)(double)’} to ‘long long unsigned int’ [-fpermissive]
   32 |         cin >> n >> x0 >> y0 >> d >> t;
      |                           ^~
      |                           |
      |                           double (*)(double) throw () {aka double (*)(double)}
answer.code:32:27: error: cannot bind rvalue ‘(long long unsigned int)y0’ to ‘long long unsigned int&’
/usr/include/c++/13/istream:197:7: note: candidate: ‘std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]’ (near match)
  197 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/13/istream:197:7: note:   conversion of argument 1 would be ill-formed:
answer.code:32:27: error: invalid conversion from ‘double (*)(double) throw ()’ {aka ‘double (*)(double)’} to ‘long long int’ [-fpermissive]
   32 |         cin >> n >> x0 >> y0 >> d >> t;
      |                           ^~
      |                           |
      |                           double (*)(double) throw () {aka double (*)(double)}
answer.code:32:27: error: cannot bind rvalue ‘(long long int)y0’ to ‘long long int&’
/usr/include/c++/13/istream:192:7: note: candidate: ‘std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]’ (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/13/istream:192:7: note:   conversion of argument 1 would be ill-formed:
answer.code:32:27: error: invalid conversion from ‘double (*)(double) throw ()’ {aka ‘double (*)(double)’} to ‘long unsigned int’ [-fpermissive]
   32 |         cin >> n >> x0 >> y0 >> d >> t;
      |                           ^~
      |                           |
      |                           double (*)(double) throw () {aka double (*)(double)}
answer.code:32:27: error: cannot bind rvalue ‘(long unsigned int)y0’ to ‘long unsigned int&’
/usr/include/c++/13/istream:188:7...