Eroare de compilare: main.cpp: In function 'int main()': main.cpp:6:21: error: invalid use of incomplete type 'std::ifstream {aka class std::basic_ifstream<char>}' ifstream("scmax.in"); ^ In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/iosfwd:116:11: note: declaration of 'std::ifstream {aka class std::basic_ifstream<char>}' class basic_ifstream; ^~~~~~~~~~~~~~ main.cpp:7:22: error: invalid use of incomplete type 'std::ofstream {aka class std::basic_ofstream<char>}' ofstream("scmax.out"); ^ In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/iosfwd:119:11: note: declaration of 'std::ofstream {aka class std::basic_ofstream<char>}' class basic_ofstream; ^~~~~~~~~~~~~~ main.cpp:9:2: error: 'fin' was not declared in this scope fin >> N; ^~~ main.cpp:47:2: error: 'fout' was not declared in this scope fout << sol << '\n'; ^~~~ Non zero exit status: 1