Compilare: user.cpp: In function ‘void bfs(int, int*)’: user.cpp:19:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<a[x].size();i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:49:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<sol.size();i++) ^ user.cpp: In function ‘void parcurge(int, int, int*)’: user.cpp:66:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<a[x].size();i++) ^