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Codeforces Round #568 (Div. 2) F - Two Pizzas (状态压缩,暴力)
"?? ?? ??" 题意:每个顾客有几种想要的原料,每个披萨含有几种原料,问你买两块披萨,让最多的顾客全部吃到想要的原料,同时花最少的钱,需要买哪两块 原料只有九种,O(n^2) 枚举披萨 转换为(512 512) 枚举状态 ,买两个状态一样的跑一遍,买两个状态不一样的跑一遍 是被队友嫌弃的码风 ...
分类:其他好文   时间:2020-01-21 21:38:16    阅读次数:64
Educational Codeforces Round 80. C - Two Arrays
题面:https://codeforces.com/contest/1288/problem/C 题目大意: 给定n和m,有两个数组,两个数组的长度都等于m 数组内每个元素都在1到n中 对于两个数组对应的位置i,必须满足a[i]<=b[i] a数组必须是不下降的序列 b数组必须是不上升的序列 求有多 ...
分类:其他好文   时间:2020-01-21 13:30:13    阅读次数:58
Educational Codeforces Round 80 C. Two Arrays
http://codeforces.com/contest/1288/problem/C 题意: 用1—n构造两个长为m的数组a,b 满足a[i]<=b[i],a单调不减,b单调不增 求方案数 令dp[i][j][k] 表示构造了长度为i,a[i]=j,b[i]=k的方案数 dp[i][j][k]= ...
分类:其他好文   时间:2020-01-20 22:27:41    阅读次数:64
What is the difference between btree and rtree indexing?
https://softwareengineering.stackexchange.com/questions/113256/what-is-the-difference-between-btree-and-rtree-indexing 52 BTree BTree (in fact B*Tree) ...
分类:其他好文   时间:2020-01-20 20:46:31    阅读次数:76
two pointers思想 ---- 利用两个i, j两个下标,同时对序列进行扫描,以O(n)复杂度解决问题的一种思想
two pointers思想 利用两个i, j两个下标,同时对序列进行扫描,以O(n)复杂度解决问题的一种思想, 如果能用这种思想解决问题,那么会大大降低程序的复杂度。 两个利用这个思想的例子: 1. 分析: 代码: 1 while (i < j){ 2 if (a[i] + a[j] == m){ ...
分类:其他好文   时间:2020-01-20 19:16:01    阅读次数:71
PAT Advanced 1093 Count PAT's (25分)
The string APPAPT contains two PAT's as substrings. The first one is formed by the 2nd, the 4th, and the 6th characters, and the second one is formed ...
分类:其他好文   时间:2020-01-20 09:57:49    阅读次数:93
[XState] Multiple Simultaneous States with Parallel States
Can you walk and talk at the same time? If so, you've experienced what it's like to be in two states at the same time. Hopefully, those two states hav ...
分类:其他好文   时间:2020-01-20 09:39:21    阅读次数:70
LeetCode 973. K Closest Points to Origin
原题链接在这里:https://leetcode.com/problems/k-closest-points-to-origin/ 题目: We have a list of points on the plane. Find the K closest points to the origin ( ...
分类:其他好文   时间:2020-01-20 09:25:46    阅读次数:72
PAT Advanced 1009 Product of Polynomials (25分)
This time, you are supposed to find A×B where A and B are two polynomials. Input Specification: Each input file contains one test case. Each case occu ...
分类:其他好文   时间:2020-01-19 23:53:57    阅读次数:103
PAT Advanced 1002 A+B for Polynomials (25分)
This time, you are supposed to find A+B where A and B are two polynomials. Input Specification: Each input file contains one test case. Each case occu ...
分类:其他好文   时间:2020-01-19 22:18:53    阅读次数:107
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