foo.cc: In function 'long long int dfs(int)':
foo.cc:11:26: error: no matching function for call to 'max(long long int&, int&)'
   11 |         return f[x] = max(y,x);
      |                       ~~~^~~~~
In file included from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/string:50,
                 from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/locale_classes.h:40,
                 from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/ios_base.h:41,
                 from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/ios:42,
                 from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/istream:38,
                 from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/sstream:38,
                 from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/complex:45,
                 from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/ccomplex:39,
                 from stdc++.h:54:
/nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
foo.cc:11:26: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   11 |         return f[x] = max(y,x);
      |                       ~~~^~~~~
/nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
foo.cc:11:26: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   11 |         return f[x] = max(y,x);
      |                       ~~~^~~~~
In file included from /nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/algorithm:61,
                 from stdc++.h:65:
/nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/stl_algo.h:5746:5: note: candidate: 'template<class _Tp> _Tp std::max(initializer_list<_Tp>)'
 5746 |     max(initializer_list<_Tp> __l)
      |     ^~~
/nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/stl_algo.h:5746:5: note:   template argument deduction/substitution failed:
foo.cc:11:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   11 |         return f[x] = max(y,x);
      |                       ~~~^~~~~
/nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/stl_algo.h:5756:5: note: candidate: 'template<class _Tp, class _Compare> _Tp std::max(initializer_list<_Tp>, _Compare)'
 5756 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/nix/store/jgdz5wfqc6q6qhy17lsqnfpbkfi1fcar-gcc-12.2.0/include/c++/12.2.0/bits/stl_algo.h:5756:5: note:   template argument deduction/substitution failed:
foo.cc:11:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   11 |         return f[x] = max(y,x);
      |                       ~~~^~~~~

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