Compilare: user.cpp: In function ‘int caut(int)’: user.cpp:13:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<has[ind].size();i++) ^ user.cpp: In function ‘int unionx(int, int)’: user.cpp:20:22: warning: unused variable ‘aux1’ [-Wunused-variable] int r1=i,r2=j,t1,aux1=i,aux2=j; ^ user.cpp:20:29: warning: unused variable ‘aux2’ [-Wunused-variable] int r1=i,r2=j,t1,aux1=i,aux2=j; ^