Compilare: user.cpp: In function ‘void Bellman_Ford(int, int)’: user.cpp:26:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[q.front()].size(); i++) ^ user.cpp:13:12: warning: unused variable ‘prim’ [-Wunused-variable] int i, prim, ultim; ^ user.cpp:13:18: warning: unused variable ‘ultim’ [-Wunused-variable] int i, prim, ultim; ^ user.cpp: In function ‘int main()’: user.cpp:80:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<a[i].size() && ok==1; j++) { ^ user.cpp:95:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<a[i].size() && ok==1; j++) { ^ user.cpp:110:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<a[i].size() && ok==1; j++) { ^ user.cpp:53:23: warning: unused variable ‘x’ [-Wunused-variable] int aa, b, i, p, x, y, q, c, cost; ^ user.cpp:53:26: warning: unused variable ‘y’ [-Wunused-variable] int aa, b, i, p, x, y, q, c, cost; ^ user.cpp:107:14: warning: ‘imin’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol2[0]=i; ^