Eroare de compilare: main.cpp: In member function 'int Flow::maxflow()': main.cpp:202:29: warning: unused variable 'init' [-Wunused-variable] 202 | int init = sol; | ^~~~ main.cpp: In function 'int main()': main.cpp:285:22: error: no match for 'operator<<' (operand types are 'OutputWriter' and 'const char [4]') 285 | cout << "-1\n"; | ~~~~ ^~ ~~~~~~ | | | | | const char [4] | OutputWriter main.cpp:76:23: note: candidate: 'OutputWriter& OutputWriter::operator<<(int)' (near match) 76 | OutputWriter& operator<<(int nr) { | ^~~~~~~~ main.cpp:76:23: note: conversion of argument 1 would be ill-formed: main.cpp:285:25: error: invalid conversion from 'const char*' to 'int' [-fpermissive] 285 | cout << "-1\n"; | ^~~~~~ | | | const char* main.cpp:99:23: note: candidate: 'OutputWriter& OutputWriter::operator<<(const char&)' (near match) 99 | OutputWriter& operator<<(const char& ch) { | ^~~~~~~~ main.cpp:99:23: note: conversion of argument 1 would be ill-formed: main.cpp:285:25: error: invalid conversion from 'const char*' to 'char' [-fpermissive] 285 | cout << "-1\n"; | ^~~~~~ | | | const 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/istream:38, from /usr/include/c++/12.2.1/fstream:38, from main.cpp:3: /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:285:25: note: 'OutputWriter' is not derived from 'std::basic_ostream<_CharT, _Traits>' 285 | cout << "-1\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:285:25: note: 'OutputWriter' is not derived from 'std::basic_ostream<_CharT, _Traits>' 285 | cout << "-1\n"; Non zero exit status: 1