Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import <fstream> ^~~~~~ main.cpp:2:18: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] int T,N,i,j;main(){std::fstream c("bunicu.in");std::ofstream o("bunicu.out");c>>T;for(std::string x;++i<=T;o<<"\n"){c>>N;for(j=0;j<N;o<<!(x[j++]-48))c>>x;}} ^