Eroare de compilare: main.cpp: In function 'void dfs(int)': main.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i = 0; i < G[u].size(); i ++){ | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:25:9: error: no match for 'operator>>' (operand types are 'std::ofstream' {aka 'std::basic_ofstream<char>'} and 'int') 25 | fin >> n >> m; | ~~~ ^~ ~ | | | | | int | std::ofstream {aka std::basic_ofstream<char>} main.cpp:25:9: note: candidate: 'operator>>(int, int)' (built-in) 25 | fin >> n >> m; | ~~~~^~~~ main.cpp:25:9: note: no known conversion for argument 1 from 'std::ofstream' {aka 'std::basic_ofstream<char>'} to 'int' In file included from /usr/include/c++/10/string:56, from /usr/include/c++/10/bits/locale_classes.h:40, from /usr/include/c++/10/bits/ios_base.h:41, from /usr/include/c++/10/ios:42, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/fstream:38, from main.cpp:1: /usr/include/c++/10/bits/basic_string.tcc:1468:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)' 1468 | operator>>(basic_istream<_CharT, _Traits>& __in, | ^~~~~~~~ /usr/include/c++/10/bits/basic_string.tcc:1468:5: note: template argument deduction/substitution failed: main.cpp:25:12: note: 'std::ofstream' {aka 'std::basic_ofstream<char>'} is not derived from 'std::basic_istream<_CharT, _Traits>' 25 | fin >> n >> m; | ^ In file included from /usr/include/c++/10/istream:991, from /usr/include/c++/10/fstream:38, from main.cpp:1: /usr/include/c++/10/bits/istream.tcc:931:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)' 931 | operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c) | ^~~~~~~~ /usr/include/c++/10/bits/istream.tcc:931:5: note: template argument deduction/substitution failed: main.cpp:25:12: note: 'std::ofstream' {aka 'std::basic_ofstream<char>'} is not derived from 'std::basic_istream<_CharT, _Traits>' 25 | fin >> n >> m; | ^ In file included from /usr/include/c++/10/fstream:38, from main.cpp:1: /usr/include/c++/10/istream:756:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char&)' 756 | operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c) | ^~~~~~~~ /usr/include/c++/10/istream:756:5: note: template argument deduction/substitution failed: main.cpp:25:12: note: 'std::ofstream' {aka 'std::basic_ofstream<char>'} is not derived from 'std::basic_istream<char, _Traits>' 25 | fin >> n >> m; | ^ In file included from /usr/include/c++/10/fstream:38, from main.cpp:1: Non zero exit status: 1