Compilare: user.cpp: In function ‘int main()’: user.cpp:8:11: warning: ‘second’ may be used uninitialized in this function [-Wmaybe-uninitialized] #define y second ^ user.cpp:8:11: note: ‘second’ was declared here #define y second ^ user.cpp:62:23: note: in expansion of macro ‘y’ int ans = INF, x, y; ^ user.cpp:7:11: warning: ‘first’ may be used uninitialized in this function [-Wmaybe-uninitialized] #define x first ^ user.cpp:7:11: note: ‘first’ was declared here #define x first ^ user.cpp:62:20: note: in expansion of macro ‘x’ int ans = INF, x, y; ^