Compilare: main.cpp: In function 'int main()': main.cpp:27:29: warning: comparison of integer expressions of different signedness: 'std::unordered_map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 27 | if (mp_u.size() > u) { | ~~~~~~~~~~~~^~~ main.cpp:28:40: warning: comparison of integer expressions of different signedness: 'std::unordered_map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 28 | while (mp_u.size() > u) { | ~~~~~~~~~~~~^~~ main.cpp:39:29: warning: comparison of integer expressions of different signedness: 'std::unordered_map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 39 | if (mp_l.size() >= l) { | ~~~~~~~~~~~~^~~~ main.cpp:40:40: warning: comparison of integer expressions of different signedness: 'std::unordered_map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 40 | while (mp_l.size() >= l) { | ~~~~~~~~~~~~^~~~