Compilare: main.cpp: In function 'void solve(int, std::istream&, std::ostream&)': main.cpp:100:17: warning: left operand of comma operator has no effect [-Wunused-value] #define nl(...) 42 ^ main.cpp:240:18: note: in expansion of macro 'nl' dbg(id), nl(aint.query(id, id)); ^~ main.cpp:240:40: warning: right operand of comma operator has no effect [-Wunused-value] dbg(id), nl(aint.query(id, id)); ^