Problem 11

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Problem 11 # Problem_11.py """ In the 20×20 grid below, four numbers along a diagonal line have been marked in red. 08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08 49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00 81 4…

leetcode problem 11 Container With Most Water

Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find two lines, which together with x-axis forms a containe…

uoj problem 11 ydc的大树

题目大意: 给定一颗黑白树.允许删除一个白点.最大化删点后无法与删点前距自己最远的黑点连通的黑点个数.并求出方案数. 题解: 这道题很棒棒啊. 一开始想了一个做法,要用LCT去搞,特别麻烦而且还是\(O(nlogn)\)的 % 了vfk的题解才知道这道题居然是\(O(n)\)的... 我们有一个结论:一个点到其最远点的路径一定经过树的直径的重心. 因为所有直径的重心一定相同,所以我们知道重心最多有两个,并且一定连续. 所以我们将重心提至根,以新的根重新建树.那么我们现在就可以发现我们要切断的所有…

状压dp找寻环的个数 Codeforces Beta Round #11 D

http://codeforces.com/problemset/problem/11/D 题目大意:给你n个点,m条边,找该图中有几个换思路:定义dp[i][j]表示i是圈的集合,j表示该集合的终点,定义起点为这些走过的点里面最小的 //看看会不会爆int!数组会不会少了一维! //取物问题一定要小心先手胜利的条件 #include <bits/stdc++.h> using namespace std; #define LL long long #define ALL(a) a.begi…

R语言学习——欧拉计划（11）Largest product in a grid

Problem 11 In the 20×20 grid below, four numbers along a diagonal line have been marked in red. 08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 0849 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 0081 49 31 73 55 79 14 29 93 71 40 67…

Common Bugs in C Programming

There are some Common Bugs in C Programming. Most of the contents are directly from or modified from Prof. Liu Pangfeng's blog. Most credits should go to him. For all the following problems, answer the output message of the code, unless they are spec…

electrica writeup

关于 caesum.com 网上上的题目,分类有Sokoban,Ciphers,Maths,Executables,Programming,Steganography,Misc.题目有点难度,在努力奋战中…… problem 21 Factor 数806515533049393最大的质因数是多少? 因数分解题,32位int范围在四十亿左右.我是这么记这个大概值的,全球六十多亿人口,很多人还不能上网,而且有局域网的存在,IP本来够用的,因为北美划用了很多,导致了现在的IP不够用,出现了IPv6.6…