Compilare: main.cpp: In lambda function: main.cpp:14:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return m.b < 0 || m.b == 0 && m.a < 0; }; ~~~~~~~~~^~~~~~~~~~ main.cpp: In instantiation of 'bool HalfplaneSet::bad(auto:3) [with auto:3 = std::_Rb_tree_const_iterator<Line>]': main.cpp:64:15: required from here main.cpp:59:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return d > 0 && sat <= 0 || d == 0 && sat < 0; ~~~~~~^~~~~~~~~~~