Compilare: main.cpp: In function 'int main()': main.cpp:3:11: warning: unused variable 'first' [-Wunused-variable] #define x first ^ main.cpp:18:13: note: in expansion of macro 'x' int x,y; cin>>a[i].y>>a[i].x; ^ main.cpp:4:11: warning: unused variable 'second' [-Wunused-variable] #define y second ^ main.cpp:18:15: note: in expansion of macro 'y' int x,y; cin>>a[i].y>>a[i].x; ^ main.cpp:4:11: warning: unused variable 'second' [-Wunused-variable] #define y second ^ main.cpp:30:12: note: in expansion of macro 'y' ll y=it->y; ^