void porder(BTree *b) { BTree *St[MaxSize],*p; ; if(b!=NULL) { top++; St[top]=b; ) { p=St[top]; top--; printf("%c",p->data); if(p->rchild!=NULL) { top++; St[top]=p->rchild; } if(p->lchild!=NULL) { top++; St[top]=p->lchild; } } } }…

题目链接 裸二维树状数组 #include <bits/stdc++.h> const int N = 305; struct BIT_2D { int c[105][N][N], n, m; void init(int n, int m) { memset (c, 0, sizeof (c)); this->n = n; this->m = m; } void updata(int k, int x, int y, int z) { for (int i=x; i<=n;…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=1559 最大子矩阵 Time Limit: 30000/10000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2901    Accepted Submission(s): 1454 Problem Description 给你一个m×n的整数矩阵,在上面找一个x×y的子矩阵,使…

[.net 面向对象程序设计进阶] (6) Lamda表达式(二) 表达式树快速入门 本节导读: 认识表达式树(Expression Tree),学习使用Lambda创建表达式树,解析表达式树. 学习表达式在程序设计中的优点:比如构造动态查询.动态构造表达式树完成未知对象属性访问,比反射的性能高出很多.我们可以说表达式树才是Lambda的精髓,是我们必须要熟练掌握并灵活运用的. 1.关于表达式树(Expression Tree) 表达式树以树形数据结构表示代码,其中每一个节点都是一种表达式,比如…

Matrix Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 22058   Accepted: 8219 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, j] = 0 (1…

Mobile phones Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 14489   Accepted: 6735 Description Suppose that the fourth generation mobile phone base stations in the Tampere area operate as follows. The area is divided into squares. The…

D. Iahub and Xors   Iahub does not like background stories, so he'll tell you exactly what this problem asks you for. You are given a matrix a with n rows and n columns. Initially, all values of the matrix are zeros. Both rows and columns are 1-based…

题意:给你一个n*n的全0矩阵,每次有两个操作: C x1 y1 x2 y2:将(x1,y1)到(x2,y2)的矩阵全部值求反 Q x y:求出(x,y)位置的值 树状数组标准是求单点更新区间求和,但是我们处理一下就可以完美解决此问题.区间更新可以使用区间求和的方法,在更新的(x2,y2)记录+1,在更新的(x1-1,y1-1)-1(向前更新到最前方).单点求和就只需要与区间更新相反,向后求一个区间和.这样做的理由是:如果求和的点在某次更新范围内,我们+1但是不执行-1,否者要么都不执行,要么都…

Matrix Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 25004   Accepted: 9261 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, j] = 0 (1…

Matrix Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 17224   Accepted: 6460 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, j] = 0 (1…