Compilare: user.cpp: In function ‘int main()’: user.cpp:20:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((1<<(2*max))<s) ^ user.cpp:11:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u",&n); ^ user.cpp:14:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u",&x); ^