Eroare de compilare: main.cpp: In function 'void add(std::string)': main.cpp:27:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:81:3: error: 'fin' was not declared in this scope; did you mean 'sin'? 81 | fin >> n >> m >> k; | ^~~ | sin main.cpp:113:3: error: 'fout' was not declared in this scope 113 | fout << ans; | ^~~~ Non zero exit status: 1