Compilare: user.cpp: In function ‘int kruskal()’: user.cpp:62:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < edges.size(); i++) { ^ user.cpp:74:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int uni(int, int)’: user.cpp:58:1: warning: control reaches end of non-void function [-Wreturn-type] } ^