Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:32:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0 ; i <G[node].size(); ++i ) ^ user.cpp:30:39: warning: unused variable ‘val’ [-Wunused-variable] int node = Heap.top().first , val = Heap.top().second; ^ user.cpp:24:10: warning: unused variable ‘j’ [-Wunused-variable] int i , j ; ^ user.cpp: In function ‘int main()’: user.cpp:49:13: warning: unused variable ‘j’ [-Wunused-variable] int i , j , x , y , c ; ^