Compilare: user.cpp: In function ‘int cuplaj(int)’: user.cpp:17:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(register int i=0;i<C[nod].size();i++){ ^ user.cpp:25:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(register int i=0;i<C[nod].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:37:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,x,y,nr,rez; ^