userluoxuan的专栏

解题思路： 貌似

解题思路： 完全就是二维树状数组的模板

Description Japan plans to welcome the ACM ICPC World Finals and a lot of roads must be built for the venue. Japan is tall island with N cities on the East coast and M cities on the West coast (M

Description In this problem, you have to analyze a particular sorting algorithm. The algorithm processes a sequence of n distinct integers by swapping two adjacent sequence elements until the seq

解题思路： 最基础的树状数组，

http://www.topcoder.com/tc?module=Static&d1=tutorials&d2=binaryIndexedTrees#prob 树状数组中用的d【】，每个点都有一定的管辖范围； 如d[1]=a[1]; d[2]=a[1]+a[2]; d[3]=a[3]; d[4]=a[1]+a[2]+a[3]+a[4]; 等等； 这样

解题思路： 题目一开始没看懂，读了半天才知道是一颗