Compilare: main.cpp: In function 'bool isBalanced(const std::string&)': main.cpp:8:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 8 | for (int i = 0; i < str.length(); ++i) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int solve(std::string&, int)': main.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type] 42 | } | ^