Compilare: user.cpp: In function ‘void dijktra()’: user.cpp:67:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[v].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:83:9: warning: unused variable ‘x’ [-Wunused-variable] int x,y,cost; ^ user.cpp:83:11: warning: unused variable ‘y’ [-Wunused-variable] int x,y,cost; ^ user.cpp:83:13: warning: unused variable ‘cost’ [-Wunused-variable] int x,y,cost; ^