Compilare: main.cpp: In function 'int main()': main.cpp:17:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i = 0; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:25:36: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 25 | while(!st.empty() && st.size() > m){ | ~~~~~~~~~~^~~