Compilare: main.cpp: In function 'int main()': main.cpp:13:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i = 0; i < s.length(); ++i){ | ~~^~~~~~~~~~~~ main.cpp:16:81: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 16 | while(!st.empty() && x > st.top() && st.size() - 1 + s.length() - i >= m) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:19:26: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 19 | if(st.size() != m) | ~~~~~~~~~~^~~~