ACM.hit.edu.cn

This is a wonderful website!

It was set up by paws, xiaoyin and xiong before one year. I knew it when it began. But I tried it from this evening.

After so long time without practising programming, my program ability was very poor(I thought so.) The first problem was very easy. I passed it very fast. But the second problem spent me about two hours. As there were so many restrict of c language that I forgot.

Finally, my program passed the limit.

So wonderful and useful website. I would like to solve a problem per day.

Thanks to Paws for his recommendation.