Compilare: main.cpp: In function 'int main()': main.cpp:19:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int i = 0; i < x.length(); i++) | ~~^~~~~~~~~~~~ main.cpp:30:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for (int i = 0; i < d.size()-k; i++) | ~~^~~~~~~~~~~~ main.cpp:32:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | else for (int i = 0; i < d.size(); i++) | ~~^~~~~~~~~~