Compilare: main.cpp: In function 'int main()': main.cpp:53:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (int j = 10; j < input.size() && input[j] != ')'; ++j) | ~~^~~~~~~~~~~~~~