Compilare: user.cpp: In function ‘void build(int, int, int)’: user.cpp:13:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = st+dr >> 1; ~~^~~ user.cpp: In function ‘void update(int, int, int)’: user.cpp:25:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = st+dr >> 1; ~~^~~ user.cpp: In function ‘int query(int, int, int)’: user.cpp:34:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = st+dr >> 1; ~~^~~