Compilare: user.cpp: In function ‘void bagaNODU(int)’: user.cpp:83:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i < G[x].size();i++) ^ user.cpp: In function ‘void prim()’: user.cpp:101:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0;j < G[x].size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:125:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int i = 0;i < n - 1; ++i) ^