摘要：
树状数组：http://blog.csdn.net/lulipeng_cpp/article/details/7816527http://www.cnblogs.com/huangxincheng/archive/2012/12/05/2802858.htmlhttp://www.cppblog.com/linyangfei/archive/2008/09/24/62688.html把《编程珠玑》读薄:http://hawstein.com/posts/make-thiner-programming-pearls.html 阅读全文
