Compilare: user.cpp: In function ‘int main()’: user.cpp:29:12: warning: unused variable ‘x’ [-Wunused-variable] int n, x, y, i, L, R, cnt; ^ user.cpp:29:15: warning: unused variable ‘y’ [-Wunused-variable] int n, x, y, i, L, R, cnt; ^ user.cpp:29:21: warning: unused variable ‘L’ [-Wunused-variable] int n, x, y, i, L, R, cnt; ^ user.cpp:27:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactivi.in", "r", stdin); ^ user.cpp:28:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactivi.out", "w", stdout); ^ user.cpp:31:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp: In member function ‘void TEMP::read()’: user.cpp:16:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &left, &right); ^