Compilare: main.cpp: In function 'void uneste(std::vector<std::vector<int> >&, std::vector<int>&, std::pair<int, int>&, int&, int&, int&, std::vector<std::pair<int, int> >&, std::set<std::pair<int, int> >&)': main.cpp:56:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < comp[unchecked].size();i++){ ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:90:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < comp[0].size();i++) ~~^~~~~~~~~~~~~~~~