Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import <fstream> ^~~~~~ main.cpp:3:168: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] int n,a,b;int f(int k,int x,int y){if(k==1)r 0;k/=2;if(x>k&&y>k)r 2*k*k+f(k,x-k,y-k);if(x<=k&&y<=k)r f(k,y,x);if(y>k)r k*k+f(k,x,y-k);r 3*k*k+f(k,k+1-y,2*k+1-x);}main(){std::fstream i("fractal.in");std::ofstream o("fractal.out");i>>n>>a>>b;o<<f(1<<n,a,b);} ^