A Simple Problem with Integers Time Limit: 5000/1500 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5034 Accepted Submission(s): 1589 Problem Description Let A1, A2, ... , AN be N elements. You need to deal with…
Fenwick Tree, (also known as Binary Indexed Tree,二叉索引树), is a high-performance data structure to calculate the sum of elements from the beginning to the indexed in a array. It needs three functions and an array: Array sum; It stores the data of Fenwi…
树状数组又称芬威克树,概念上是树状,实际上是使用数组实现的,表现为一种隐式数据结构,balabala...详情请见:https://en.wikipedia.org/wiki/Fenwick_tree 其中`i += (i & -i)`的相当于求 $ 2^{n-1} , n \in 1,2,3... $,还可以写成`i += (i & (i ^ (i - 1)))`. code: #include <iostream> #define LSB(i) (i & -i) c…
Apple Tree Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 18623 Accepted: 5629 Description There is an apple tree outside of kaka's house. Every autumn, a lot of apples will grow in the tree. Kaka likes apple very much, so he has been…
Turing Tree Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4948 Accepted Submission(s): 1746 Problem Description After inventing Turing Tree, 3xian always felt boring when solving problems a…