Compilare: user.cpp: In function ‘int main()’: user.cpp:12:9: warning: unused variable ‘x’ [-Wunused-variable] int x, y; ^ user.cpp:12:12: warning: unused variable ‘y’ [-Wunused-variable] int x, y; ^ user.cpp:15:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ user.cpp:20:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^