摘要：Problem Description Let A1, A2, ... , AN be N elements. You need to deal with two kinds of operations. One type of operation is to add a given number 阅读全文

摘要：Problem Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let 阅读全文

摘要：Problem Description You have a sequence {a1,a2,...,an} and you can delete a contiguous subsequence of length m. So what is the minimum number of inver 阅读全文

摘要：Problem Description Now I am leaving hust acm. In the past two and half years, I learned so many knowledge about Algorithm and Programming, and I met 阅读全文

摘要：Problem Description Peter has a sequence a1,a2,...,an and he define a function on the sequence -- F(a1,a2,...,an)=(f1,f2,...,fn), where fi is the leng 阅读全文

摘要：Problem Description P is a permutation of the integers from 1 to N(index starting from 1).Here is the code of Bubble Sort in C++. for(int i=1;i<=N;++i 阅读全文

摘要：Description C国的死对头A国这段时间正在进行军事演习，所以C国间谍头子Derek和他手下Tidy又开始忙乎了。A国在海岸线沿直线布置了N个工兵营地,Derek和Tidy的任务就是要监视这些工兵营地的活动情况。由于采取了某种先进的监测手段，所以每个工兵营地的人数C国都掌握的一清二楚,每个工 阅读全文

摘要：Problem Description After inventing Turing Tree, 3xian always felt boring when solving problems about intervals, because Turing Tree could easily have 阅读全文

摘要：Description Every year, Farmer John's N (1 <= N <= 20,000) cows attend "MooFest",a social gathering of cows from around the world. MooFest involves a 阅读全文

摘要：【题意】给你一个矩阵（初始化为0）和一些操作，1 x y a表示在arr[x][y]加上a，2 l b r t 表示求左上角为(l,b),右下角为(r,t)的矩阵的和。 【思路】帮助更好理解树状数组。 阅读全文

摘要：Description Given an N*N matrix A, whose elements are either 0 or 1. A[i, j] means the number in the i-th row and j-th column. Initially we have A[i, 阅读全文

摘要：Description Seiji Hayashi had been a professor of the Nisshinkan Samurai School in the domain of Aizu for a long time in the 18th century. In order to 阅读全文

摘要：参考资料：http://blog.csdn.net/z309241990/article/details/9615259 一维树状数组： 使用情况：当要频繁的对数组元素进行修改,同时又要频繁的查询数组内任一区间元素之和的时候,可以考虑使用树状数组. 一、回顾一维树状数组 假设一维数组为A[i](i= 阅读全文