Compilare: main.cpp: In function 'int main()': main.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:25:38: 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()==0 and st.size()>m) | ~~~~~~~~~^~