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;