Compilare: main.cpp: In function 'std::vector<long long int> gen(std::vector<long long int>)': main.cpp:114:10: warning: statement has no effect [-Wunused-value] nl(a); ^ main.cpp: In function 'void solve(int, std::istream&, std::ostream&)': main.cpp:142:10: warning: statement has no effect [-Wunused-value] nl(s); ^ main.cpp:100:17: warning: left operand of comma operator has no effect [-Wunused-value] #define nl(...) 42 ^ main.cpp:169:18: note: in expansion of macro 'nl' dbg(it), nl(st); ^~ main.cpp:169:24: warning: right operand of comma operator has no effect [-Wunused-value] dbg(it), nl(st); ^