Compilare: user.cpp: In function ‘int bfs()’: user.cpp:31:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++){ ^ user.cpp: In function ‘int addpath(int)’: user.cpp:43:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++) if(G[x][i]==Dest) ipos=i; ^ user.cpp:44:19: warning: ‘ipos’ may be used uninitialized in this function [-Wmaybe-uninitialized] much=C[x][ipos]; ^