Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:45:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[start].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:125:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(idx=0;idx<v[start].size();idx++) ^ user.cpp:135:18: warning: statement has no effect [-Wunused-value] for(j;(q[i].value&old)==(q[j].value&old)&&j<=Q;j++); ^