POJ3468 A Simple Problem with Integers 线段树|树状数组BIT(区间增减,求和)
ASimpleProblemwithIntegersTimeLimit: 5000MS MemoryLimit: 131072KTotalSubmissions: 75499 Accepted: 23268CaseTimeLimit: 2000MSDescriptionYouhave N integers, A1, A2,..., AN.Youneedtodealwithtwokindsofope