Compilare: user.cpp: In function ‘int main()’: user.cpp:50:29: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(nrd==2 || nrd==6 && sc%3==0 || nrd==18 && sc%9==0) ^ user.cpp:50:51: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(nrd==2 || nrd==6 && sc%3==0 || nrd==18 && sc%9==0) ^ user.cpp:53:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(nrd==3 && sc%3==0 || nrd==9 && sc%9==0) ^ user.cpp:56:38: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(nrd==5 || nrd==15 && sc%3==0) ^