Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<bits/stdc++.h> ^~~~~~ main.cpp:2:11: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main(int N){std::fstream i("sticle.in");std::ofstream o("sticle.out");for(;i>>N;o<<(N=log2(2*N-1))<<"\n");} ^ main.cpp:2:1: warning: 'int main(int)' takes only zero or two arguments [-Wmain] main(int N){std::fstream i("sticle.in");std::ofstream o("sticle.out");for(;i>>N;o<<(N=log2(2*N-1))<<"\n");} ^~~~