Compilare: main.cpp: In function 'int main()': main.cpp:23:87: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 23 | while (!st.empty() and s[i] > s[st.top()] and st.size() - 1 + (n - 1) - i + 1 >= m) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:33:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for (i = 0; i < m and i < sol.size(); i++) | ~~^~~~~~~~~~~~