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;i++){c>>N;for(j=0;j<N;o<<"\n",j++)c>>x,o<<!(x[j]-48);}} ^