Compilare: main.cpp: In function 'int main()': main.cpp:14:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(int i = 0; i < s.length(); ++i){ | ~~^~~~~~~~~~~~ main.cpp:17:68: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 17 | while(nr != 0 && x > st[nr] && nr - 1 + s.length() - i >= m) | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~