Compilare: user.cpp: In function ‘void dijkstra(int, costuri*)’: user.cpp:28:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<costs[x].v.size();i++){ ^ user.cpp:39:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<costs[k].v.size();i++) ^ user.cpp:18:11: warning: unused variable ‘minim’ [-Wunused-variable] int i,minim,k; ^ user.cpp:34:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok = 1; ^