Compilare: main.cpp: In member function 'bool Matcher::pairup(int)': main.cpp:14:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 14 | return l[r[u] = v] = u; main.cpp:16:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 16 | return l[r[u] = v] = u; main.cpp: In function 'int main()': main.cpp:72:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 72 | auto [ans, sol] = M.get_light_map(); | ^