Compilare: main.cpp: In function 'std::vector<std::pair<int, int> > afis()': main.cpp:96:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void rez()': main.cpp:110:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < sol.size() ; i++) ~~^~~~~~~~~~~~