Eroare de compilare: main.cpp: In function 'int main()': main.cpp:87:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for (int i = 0; i < X.size(); ++i) { | ~~^~~~~~~~~~ main.cpp:92:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for (int i = 0; i < X.size(); ++i) | ~~^~~~~~~~~~ main.cpp:96:10: error: no match for 'operator<<' (operand types are 'std::ifstream' {aka 'std::basic_ifstream<char>'} and 'std::ios_base&(std::ios_base&)') 96 | fout << fixed << setprecision(6) << sqrt(solve(0, X.size(), X, Y)) << "\n"; | ~~~~ ^~ ~~~~~ | | | | | std::ios_base&(std::ios_base&) | std::ifstream {aka std::basic_ifstream<char>} In file included from /usr/include/c++/12.2.1/bits/basic_string.h:47, from /usr/include/c++/12.2.1/string:53, from /usr/include/c++/12.2.1/bits/locale_classes.h:40, from /usr/include/c++/12.2.1/bits/ios_base.h:41, from /usr/include/c++/12.2.1/ios:42, from /usr/include/c++/12.2.1/ostream:38, from /usr/include/c++/12.2.1/iostream:39, from main.cpp:1: /usr/include/c++/12.2.1/string_view:672:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, basic_string_view<_CharT, _Traits>)' 672 | operator<<(basic_ostream<_CharT, _Traits>& __os, | ^~~~~~~~ /usr/include/c++/12.2.1/string_view:672:5: note: template argument deduction/substitution failed: main.cpp:96:13: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 96 | fout << fixed << setprecision(6) << sqrt(solve(0, X.size(), X, Y)) << "\n"; | ^~~~~ /usr/include/c++/12.2.1/bits/basic_string.h:3883:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)' 3883 | operator<<(basic_ostream<_CharT, _Traits>& __os, | ^~~~~~~~ /usr/include/c++/12.2.1/bits/basic_string.h:3883:5: note: template argument deduction/substitution failed: main.cpp:96:13: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 96 | fout << fixed << setprecision(6) << sqrt(solve(0, X.size(), X, Y)) << "\n"; | ^~~~~ In file included from /usr/include/c++/12.2.1/bits/ios_base.h:46: /usr/include/c++/12.2.1/system_error:279:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const error_code&)' 279 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e) | ^~~~~~~~ /usr/include/c++/12.2.1/system_error:279:5: note: template argument deduction/substitution failed: main.cpp:96:13: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 96 | fout << fixed << setprecision(6) << sqrt(solve(0, X.size(), X, Y)) << "\n"; | ^~~~~ /usr/include/c++/12.2.1/ostream:507:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _CharT)' 507 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c) | ^~~~~~~~ /usr/include/c++/12.2.1/ostream:507:5: note: template argument deduction/substitution failed: main.cpp:96:13: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 96 | fout << fixed << setprecision(6) << sqrt(solve(0, X.size(), X, Y)) << "\n"; | ^~~~~ Non zero exit status: 1