Compilare: user.cpp: In function ‘int main()’: user.cpp:72:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[current_node].size(); ++i){ ^ user.cpp:67:13: warning: unused variable ‘current_distance’ [-Wunused-variable] int current_distance = heap[1].value; ^