Compilare: user.cpp: In function ‘void Combine(int, int)’: user.cpp:29:15: warning: unused variable ‘rez’ [-Wunused-variable] long long rez = 0; ^ user.cpp: In function ‘int main()’: user.cpp:55:9: warning: variable ‘N’ set but not used [-Wunused-but-set-variable] int N, M, x, y; ^ user.cpp:55:15: warning: unused variable ‘x’ [-Wunused-variable] int N, M, x, y; ^ user.cpp:55:18: warning: unused variable ‘y’ [-Wunused-variable] int N, M, x, y; ^