Eroare de compilare: main.cpp: In function 'int main()': main.cpp:28:25: error: no match for 'operator==' (operand types are 'std::basic_ostream<char>::__ostream_type' {aka 'std::basic_ostream<char>'} and 'int') 28 | cout << __gcd(a, b) == 1 ? 0 : __gcd(a, b); | ~~~~~~~~~~~~~~~~~~~ ^~ ~ | | | | | int | std::basic_ostream<char>::__ostream_type {aka std::basic_ostream<char>} main.cpp:28:25: note: candidate: 'operator==(int, int)' (built-in) 28 | cout << __gcd(a, b) == 1 ? 0 : __gcd(a, b); | ~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:28:25: note: no known conversion for argument 1 from 'std::basic_ostream<char>::__ostream_type' {aka 'std::basic_ostream<char>'} to 'int' In file included from /usr/include/c++/10/regex:62, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/10/bits/regex.h:1035:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator==(const std::__cxx11::sub_match<_BiIter>&, const std::__cxx11::sub_match<_BiIter>&)' 1035 | operator==(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) | ^~~~~~~~ /usr/include/c++/10/bits/regex.h:1035:5: note: template argument deduction/substitution failed: main.cpp:28:28: note: 'std::basic_ostream<char>::__ostream_type' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>' 28 | cout << __gcd(a, b) == 1 ? 0 : __gcd(a, b); | ^ In file included from /usr/include/c++/10/regex:62, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/10/bits/regex.h:1131:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator==(std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const std::__cxx11::sub_match<_BiIter>&)' 1131 | operator==(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/regex.h:1131:5: note: template argument deduction/substitution failed: main.cpp:28:28: note: 'std::basic_ostream<char>::__ostream_type' {aka 'std::basic_ostream<char>'} is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>' 28 | cout << __gcd(a, b) == 1 ? 0 : __gcd(a, b); | ^ In file included from /usr/include/c++/10/regex:62, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/10/bits/regex.h:1206:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator==(const std::__cxx11::sub_match<_BiIter>&, std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)' 1206 | operator==(const sub_match<_Bi_iter>& __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/regex.h:1206:5: note: template argument deduction/substitution failed: main.cpp:28:28: note: 'std::basic_ostream<char>::__ostream_type' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>' 28 | cout << __gcd(a, b) == 1 ? 0 : __gcd(a, b); | ^ In file included from /usr/include/c++/10/regex:62, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/10/bits/regex.h:1298:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const typename std::iterator_traits<_Iter>::value_type*, const std::__cxx11::sub_match<_BiIter>&)' 1298 | operator==(typename iterator_traits<_Bi_iter>::value_type const* __lhs, | ^~~~~~~~ /usr/include/c++/10/bits/regex.h:1298:5: note: template argument deduction/substitution failed: main.cpp:28:28: note: mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int' 28 | cout << __gcd(a, b) == 1 ? 0 : __gcd(a, b); Non zero exit status: 1