Compilare: main.cpp: In function 'int main()': main.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 0; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp:31:29: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 31 | else if (stack.size() + M < N) | ~~~~~~~~~~~~~~~~~^~~ main.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for (int i = 0; i < s.size() - M; ++i) | ~~^~~~~~~~~~~~~~ main.cpp:19:6: warning: unused variable 'contor' [-Wunused-variable] 19 | int contor = 0; | ^~~~~~