Compilare: user.cpp: In function ‘void init1()’: user.cpp:49:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[1].size() ==i ) ^ user.cpp:46:9: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] int a[1009]; ^ user.cpp: In function ‘void bfs()’: user.cpp:67:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i < v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:121:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();j++) ^ user.cpp:106:25: warning: unused variable ‘k’ [-Wunused-variable] short int m, i, j, k, x, y; ^