Compilare: user.cpp: In function ‘void citire()’: user.cpp:45:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<G[start].size(); i++) ^ user.cpp: In function ‘void prim()’: user.cpp:65:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<G[vfmin].size(); j++) ^ user.cpp:63:22: warning: ‘vfmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] sel[vfmin]=1; ^