Compilare: user.cpp: In function ‘void bfs()’: user.cpp:39:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i < v[nod].size();i++) ^ user.cpp:65:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i < sol.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:101:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();j++) ^ user.cpp:86:19: warning: unused variable ‘k’ [-Wunused-variable] int m, i, j, k, x, y; ^