线段树-代码实现细节与技巧

HDU 4509 湫湫系列故事——减肥记II（线段树-区间覆盖 或者 暴力技巧）

http://acm.hdu.edu.cn/showproblem.php?pid=4509 题目大意: 中文意义,应该能懂. 解题思路: 因为题目给的时间是一天24小时,而且还有分钟.为了解题方便,我们将小时换成分钟,那么一天24小时,总共有1440分钟.顾我就可以把一天里的任意HH:MM时间换成分钟.就这样一天的时间就变成[0,1440]区间了. 因为所给的活动最多是5*10^5,如果把活动的时间在线段[0,1440]都修改,那么时间的复杂度最坏是O(5*10^5*1440). (1)方法一

hdu1394线段树点修改，区间求和

Problem Description The inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that satisfy i < j and ai > aj. For a given sequence of numbers a1, a2, ..., an, if we move the first m >= 0 numbers to the end of

POJ3264 Balanced Lineup 线段树 RMQ ST算法应用

Balanced Lineup Time Limit: 5000MS Memory Limit: 65536K Total Submissions: 36813 Accepted: 17237 Case Time Limit: 2000MS Description For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John de

hdu 4638 Group(莫队算法|离线线段树)

Group Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1323    Accepted Submission(s): 703 Problem Description There are n men ,every man has an ID(1..n).their ID is unique. Whose ID is i and i-