Compilare: user.cpp: In function ‘void upd(int, int, int, int, std::pair<int, int>)’: user.cpp:27:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = l + r >> 1; ^ user.cpp: In function ‘std::pair<int, int> qry(int, int, int, int, int)’: user.cpp:40:18: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = tl + tr >> 1; ^ user.cpp: In function ‘int32_t main()’: user.cpp:48:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.in","r",stdin); ^ user.cpp:49:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.out","w",stdout); ^