Compilare: user.cpp: In function ‘void build(int, int, int)’: user.cpp:28:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(h[2*pos].x == h[2*pos+1].x) ^ user.cpp: In function ‘void update(int, int, int, int, int, int)’: user.cpp:63:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(h[2*pos].x == h[2*pos+1].x) ^ user.cpp: In function ‘lol query(int, int, int, int, int)’: user.cpp:92:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(left.x == right.x) ^ user.cpp:97:1: warning: control reaches end of non-void function [-Wreturn-type] } ^