Compilare: user.cpp: In function ‘int mst()’: user.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<A[W].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:97:9: warning: unused variable ‘Q’ [-Wunused-variable] muchie Q; ^ user.cpp: In function ‘int down(int)’: user.cpp:45:1: warning: control reaches end of non-void function [-Wreturn-type] } ^