Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:14: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] int i,d;main(){std::ifstream("submultimi.in")>>i;std::ofstream g("submultimi.out");for(i=1<<i;--i;g<<'\n')for(;i>>d;i>>d++&1&&g<<d<<' ');} ^