Compilare: user.cpp: In function ‘int main()’: user.cpp:25:36: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 4 has type ‘double’ [-Wformat=] fprintf(g,"%lld %lld",x,log2(nr)); ^ user.cpp:15:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld %lld",&x,&y); ^