Compilare: user.cpp: In function ‘int main()’: user.cpp:9:11: warning: unused variable ‘j’ [-Wunused-variable] ll i = 0,j = 0,k = 0; ^ user.cpp:9:17: warning: unused variable ‘k’ [-Wunused-variable] ll i = 0,j = 0,k = 0; ^ user.cpp:10:5: warning: unused variable ‘cx’ [-Wunused-variable] ll cx = x,cy = y; ^ user.cpp:6:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("taste.in","r",stdin); ^ user.cpp:7:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("taste.out","w",stdout); ^ user.cpp:8:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&x,&y); ^