Compilare: user.cpp: In function ‘int main()’: user.cpp:62:55: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(grup(v[j].x) != grup(v[j].y) && v[j].x <= i & v[j].y <= i) { ^ user.cpp:42:9: warning: unused variable ‘x’ [-Wunused-variable] int x,y,poz,nr = 0; ^ user.cpp:42:11: warning: unused variable ‘y’ [-Wunused-variable] int x,y,poz,nr = 0; ^ user.cpp:42:13: warning: unused variable ‘poz’ [-Wunused-variable] int x,y,poz,nr = 0; ^