Compilare: user.cpp: In function ‘void update(int, int, int, int, int, int)’: user.cpp:46:13: warning: unused variable ‘ok1’ [-Wunused-variable] int ok1 = 0, ok2 = 0; ^ user.cpp:46:22: warning: unused variable ‘ok2’ [-Wunused-variable] int ok1 = 0, ok2 = 0; ^ user.cpp: In function ‘int main()’: user.cpp:132:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("eliminare.in" ,"r", stdin ); ^ user.cpp:133:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("eliminare.out","w", stdout); ^ user.cpp:135:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &N, &M); ^ user.cpp:138:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &Vector[i]); ^ user.cpp:147:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &X, &Y); ^