Compilare: main.cpp: In function 'std::pair<int, int> removeCandidate()': main.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for (int i = 0; i < dq.size(); ++i) { | ~~^~~~~~~~~~~ main.cpp:18:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for (int i = 1; i < dq.size(); ++i) { | ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:32:23: warning: comparison of integer expressions of different signedness: 'std::deque<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 32 | if (dq.size() == n) { | ~~~~~~~~~~^~~~