Compilare: user.cpp: In function ‘void build(int, int, int)’: user.cpp:129:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = l + r >> 1; ^ user.cpp: In function ‘data qry(int, int, int, int, int)’: user.cpp:137:24: warning: integer overflow in expression [-Woverflow] if(l > r) return {-inf,-inf,-inf,-inf}; ^ user.cpp:137:29: warning: integer overflow in expression [-Woverflow] if(l > r) return {-inf,-inf,-inf,-inf}; ^ user.cpp:137:34: warning: integer overflow in expression [-Woverflow] if(l > r) return {-inf,-inf,-inf,-inf}; ^ user.cpp:137:39: warning: integer overflow in expression [-Woverflow] if(l > r) return {-inf,-inf,-inf,-inf}; ^ user.cpp:139:18: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = tl + tr >> 1; ^ user.cpp: In function ‘void upd(int, int, int, int, int)’: user.cpp:150:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = l + r >> 1; ^ user.cpp: In function ‘int32_t main()’: user.cpp:157:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxq.in","r",stdin); ^ user.cpp:158:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxq.out","w",stdout); ^