B. Maximum Submatrix 2 time limit per test 2 seconds memory limit per test 512 megabytes input standard input output standard output You are given a matrix consisting of digits zero and one, its size is n × m. You are allowed to rearrange its rows. W…

B. Maximum Submatrix 2 Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/problemset/problem/375/B Description You are given a matrix consisting of digits zero and one, its size is n × m. You are allowed to rearrange its rows. What is…

相关题型 问题一(最大和子矩阵) : 有一个 m x n 的矩阵,矩阵的元素可正可负.请找出该矩阵的一个子矩阵(方块),使得其所有元素之和在所有子矩阵中最大.(问题来源:http://acm.pku.edu.cn/JudgeOnline/problem?id=1050) 问题二( 最大 0/1 方块) :有一个 m x n 的矩阵,元素为 0 或 1.一个子矩阵,如果它所有的元素都是 0, 或者都是 1,则称其为一个 0-聚类 或 1-聚类,统称聚类(Cluster).请找出最大的聚类(元素最多…

Codeforces Round #221 (Div. 1) B:http://codeforces.com/problemset/problem/375/B 题意:给你一个n*m的0,1矩阵,你可以交换一些行,求一个最大子矩阵的面积,这个子矩阵全部包含1. 题解:看标签是数据结构,怎么想,也不知道用数据结构怎么搞.最后想到是求面积,面积不就是l*d,只要确定了了l和d,面积就出来了,于是我想到了枚举l和d.这里要先处理出来一些东西,dp[j][i]表示(i,j)的右边的有多少个连续的1,包括(…

http://codeforces.com/contest/376/problem/D 题意:给你一个矩阵,可以随意排列n行的次序,然后找出全部含有1的子矩阵.输出1的个数. 思路:c[i][j]表示在i列第j行的格子的右边连续的1的个数.对于每一列,排序c[i],然后比较c[i][j]*(n-j+1)与max1的大小,max1就是答案. #include <cstdio> #include <iostream> #include <cstring> #include…

<题目链接> 题目大意:给出一个01矩阵,行与行之间可以互换位置,问能够得到最大的全1矩阵的面积. #include <bits/stdc++.h> using namespace std; ; int n,m; int dp[N][N]; char mpa[N][N]; int main(){ while(~scanf("%d%d",&n,&m)){ ;i<=n;i++)scanf(); memset(dp,,sizeof(dp)); ;…

[链接] 我是链接,点我呀:) [题意] 如果任意行之间可以重新排序. 问你最大的全是1的子矩阵中1的个数 [题解] 设cnt[i][j] 表示(i,j)这个点往右连续的1的个数 我们枚举列j 然后对于第j列的cnt[1..n][j] 我们把这n个数字排个序(升序) 然后顺序枚举这n个数字 假设我们枚举到了第i个数字,显然第i~n这n-i+1个数字是能组成一个宽为cnt[i][j]长为n-i+1的矩形的 且这些矩形的左边界都是i 这就是这道题的技巧所在了 找到最短的宽度,让比它长的都和它适应 秒…

A 7的所有的余数都可以用1,6,8,9排列得到,然后搞一下就可以了. B 可以用类似于单调队列的东西搞.具体看代码: /* * Problem: B. Maximum Submatrix 2 * Author: Shun Yao * Note: 题目要求交换行,我写的交换列.于是把矩阵转换一下就可以. */ #include <string.h> #include <stdlib.h> #include <limits.h> #include <assert.h…

各种杂题,水题,模拟,包括简单数论. 1001 A+B 1002 A+B+C 1009 Fat Cat 1010 The Angle 1011 Unix ls 1012 Decoding Task 1019 Grandpa's Other Estate 1034 Simple Arithmetics 1036 Complete the sequence! 1043 Maya Calendar 1054 Game Prediction 1057 Mileage Bank 1067 Rails 10…

-----------------------------最优化问题------------------------------------- ----------------------常规动态规划  SOJ1162 I-Keyboard  SOJ1685 Chopsticks SOJ1679 Gangsters SOJ2096 Maximum Submatrix  SOJ2111 littleken bg SOJ2142 Cow Exhibition  SOJ2505 The County…

1.Two Sum 构造Comparator,KSum 这一类的问题最基本的一题, 解法: 先sort,然后双指针,头尾各一个.进行加逼找值. 对于其余的KSum最终是降次到2次. 如3Sum固定一个,然后找另外两个. 4Sum两两一组然后在对pair进行操作. 2.Median of Two Sorted Arrays 二分查找的应用. 二分查找的结果肯定是start > end.注意分的两个区间是 start, mid -1 和 mid + 1, end. 这里的话每次只能减少某个array…

Bob is a strategy game programming specialist. In his new city building game the gaming environment is as follows: a city is built up by areas, in which there are streets, trees,factories and buildings. There is still some space in the area that is u…

18.12 Given an NxN matrix of positive and negative integers, write code to find the submatrix with the largest possible sum. 这道求和最大的子矩阵,跟LeetCode上的Maximum Size Subarray Sum Equals k和Maximum Subarray很类似.这道题不建议使用brute force的方法,因为实在是不高效,我们需要借鉴上面LeetCode…

E - Maximum Square Time Limit:4500MS     Memory Limit:0KB     64bit IO Format:%lld & %llu Submit Status Practice UVALive 4867 Description Given an NxM matrix of all 1s and 0s, find the largest submatrix which is a square containing all 1s. Input Ther…

MINSUB - Largest Submatrix no tags  You are given an matrix M (consisting of nonnegative integers) and an integer K.  For any submatrix of M' of M define min(M') to be the minimum value of all the entries of M'.  Now your task is simple:  find the ma…

Maximum repetition substring Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9458   Accepted: 2915 Description The repetition number of a string is defined as the maximum number R such that the string can be partitioned into R same conse…

异常处理汇总-前端系列 http://www.cnblogs.com/dunitian/p/4523015.html 开发道路上不是解决问题最重要,而是解决问题的过程,这个过程我们称之为~~~调试 记一次填坑记,下次一定注意休息...各种低级错误... 1.错误信息:Uncaught RangeError: Maximum call stack size exceeded 我没用递归啊?也没有引入冲突的js库啊?什么状况?(一般都是这两种原因导致的,今天又发现了一种情况) 2.出错一般都是先看下…

真机调试免费App ID出现的问题The maximum number of apps for free development profiles has been reached.免费应用程序调试最大限度苹果免费App ID只能运行2个应用程序,当调试第三个的时候就会报这个错误,必须把之前的应用程序删除,才能调试新的 解决办法:1.连接iPhone 打开Xcode->Window->Devices     2.接着出现这个界面   3.删除其中一个,不是本次运行的应用程序 4.接着会弹框  …

最大传输单元(Maximum transmission unit),以太网MTU为1500. 不同网络MTU如下: 如果最大报文数据大小(MSS)超过MTU,则会引起分片操作.   路径MTU: 网路中主机之间的MTU不是一个常数,取决于所选择的路由,而且路径不一定对称(A到B的选路,B到A的选路).ICMP MTU发现方法.   MSS: 标识TCP传往另一段的最大数据长度,建立连接时,双发通告自己允许的MSS(只能出现在SYN报文中). 因为每一次发送报文都会包含IP及TCP首部,所以,发送…

aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAB1QAAAMcCAIAAABo0QCJAAAgAElEQVR4nOydW7msuhKF2wIasIAHJK…

Given a non-empty array of numbers, a0, a1, a2, … , an-1, where 0 ≤ ai < 231. Find the maximum result of ai XOR aj, where 0 ≤ i, j < n. Could you do this in O(n) runtime? Example: Input: [3, 10, 5, 25, 2, 8] Output: 28 Explanation: The maximum resul…

Given a non-empty array of integers, return the third maximum number in this array. If it does not exist, return the maximum number. The time complexity must be in O(n). Example 1: Input: [3, 2, 1] Output: 1 Explanation: The third maximum is 1. Examp…

Given an array nums and a target value k, find the maximum length of a subarray that sums to k. If there isn't one, return 0 instead. Example 1: Given nums = [1, -1, 5, -2, 3], k = 3, return 4. (because the subarray [1, -1, 5, -2] sums to 3 and is th…

Given two arrays of length m and n with digits 0-9 representing two numbers. Create the maximum number of length k <= m + n from digits of the two. The relative order of the digits from the same array must be preserved. Return an array of the k digit…

Given a string array words, find the maximum value of length(word[i]) * length(word[j]) where the two words do not share common letters. You may assume that each word will contain only lower case letters. If no such two words exist, return 0. Example…

Given an unsorted array, find the maximum difference between the successive elements in its sorted form. Try to solve it in linear time/space. Return 0 if the array contains less than 2 elements. You may assume all elements in the array are non-negat…

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = 6. 这个求最大子数组乘积问题是由最大子数组之和问题演变而来,但是却比求最大子数组之和要复…

Given a binary tree, find the maximum path sum. The path may start and end at any node in the tree. For example:Given the below binary tree, 1 / \ 2 3 Return 6. 这道求二叉树的最大路径和是一道蛮有难度的题,难就难在起始位置和结束位置可以为任意位置,我当然是又不会了,于是上网看看大神们的解法,看了很多人的都没太看明白,最后发现了网友Yu's…

Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 求二叉树的最大深度问题用到深度优先搜索DFS,递归的完美应用,跟求二叉树的最小深度问题原理相同.代码如下: C++ 解法一: class Solution { public: in…

Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4],the contiguous subarray [4,−1,2,1] has the largest sum = 6. click to show more practice. Mor…