Compilare: user.cpp: In function ‘long long unsigned int query(long long unsigned int)’: user.cpp:39:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<=lim;i++) ^ user.cpp:42:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(my_log(now,val)>i)val++; ^ user.cpp:47:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int r=2;r<=lim;r++) ^ user.cpp: In function ‘int main()’: user.cpp:72:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^ user.cpp:67:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bonus.in", "r", stdin); ^ user.cpp:68:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bonus.out", "w", stdout); ^