Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:29:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[k].size();i++) ^ user.cpp:21:14: warning: unused variable ‘OK’ [-Wunused-variable] int nr,k,OK; ^ user.cpp: In function ‘int main()’: user.cpp:47:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[1].size();i++) ^ user.cpp: In function ‘void dijkstra()’: user.cpp:29:33: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=0;i<v[k].size();i++) ^