Compilare: main.cpp: In member function 'bool Matcher::pairup(int)': main.cpp:13:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 13 | return l[r[u] = v] = u; main.cpp:15:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 15 | return l[r[u] = v] = u;