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HDU - 4939 Stupid Tower Defense
Problem Description FSF is addicted to a stupid tower defense game. The goal of tower defense games is to try to stop enemies from crossing a map by building traps to slow them down and towers which...
分类:其他好文   时间:2014-08-13 13:14:47    阅读次数:196
UVa 10891 (博弈+DP) Game of Sum
最开始的时候思路就想错了,就不说错误的思路了。因为这n个数的总和是一定的,所以在取数的时候不是让自己尽可能拿的最多,而是让对方尽量取得最少。记忆化搜索:d(i, j)表示原序列中第i个元素到第j个元素构成的子序列,先手取数能够得到的最大值。sum(i, j) 表示从第i个元素到第j个元素的和因为要让...
分类:其他好文   时间:2014-08-13 12:47:56    阅读次数:247
hdu4944FSF’s game(数论)
题目:hdu4944FSF’s game(数论) 题目大意:给定N,然后会有N * ( N + 1)/2个等级的矩形,(1 * 1, 2 * 1, 2* 2, ...N * 1, N * 2.. N* N).将这些矩阵分成大小相同的K * K 的正方形,能够获得金币A * B / gcd(A / K, B/ K);然后给定N,问能够得到的总金币。 解题思路:对于sum(N):...
分类:其他好文   时间:2014-08-13 10:31:50    阅读次数:262
Topcoder SRM 627 div1 HappyLettersDiv1 : 字符串
Problem StatementThe Happy Letter game is played as follows: At the beginning, several players enter the field. Each player has a lowercase English le...
分类:移动开发   时间:2014-08-13 03:33:35    阅读次数:201
POJ 2738 Two Ends(记忆化)
Description In the two-player game "Two Ends", an even number of cards is laid out in a row. On each card, face up, is written a positive integer. Players take turns removing a card from either end...
分类:其他好文   时间:2014-08-13 01:18:05    阅读次数:209
HDU 4944 FSF’s game(数论+递推)
#include #include typedef unsigned long long ll; const ll MOD = (1ULL<<32); const int N = 500001; int t, n; ll ans[N], frc[N]; void init() { for (ll i = 1; i < N; i++) { for (ll j = i; j < ...
分类:其他好文   时间:2014-08-13 01:14:05    阅读次数:218
[Python 2.7] Hello World CGI HTTP Server
# CGI HTTP server ## Getting Started Python 2.x is preferred to this simple demo. I'm using Python 2.7 over windows. * https://docs.python.org/2.7/library/cgihttpserver.html * https://do...
分类:编程语言   时间:2014-08-13 01:09:54    阅读次数:222
[LeetCode] Jump Game II(贪婪算法)
Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents your maximu...
分类:其他好文   时间:2014-08-13 00:28:34    阅读次数:324
hdu 4944 FSF’s game(数论)
题目链接:hdu 4944 FSF’s game 题目大意:给定N,可以用不大于N的长a和宽b,组成N?(N?1)2种不同的矩形,对于每个矩形a?b要计算它的值,K为矩形a,b可以拆分成若干个K?K的正方形。∑a?bgcd(a/k,b/k),输出所有矩形值的和。 解题思路:假设有边a和b,那么k肯定即使a的因子也是b的因子。定义f(n)为矩形最长边等于n的情况下所有矩形值的和。那么f(...
分类:其他好文   时间:2014-08-12 22:17:44    阅读次数:322
HDU4944-FSF’s game(递推)
题目链接 题意:给定一个整数n,求∑f(i, j)(1 思路:依题意,我们可以得到一个递推式ans[n] = ans[n - 1] + ∑f(n, j)(1 对于∑f(n, j)而言,我们用aj(1 <= j <= n)表示gcd(n/k, j/k)所能取到的值的集合,那么可以得到∑f(n, j) = (n * 1 / a1 + n * 2 / a2 + ... + ...
分类:其他好文   时间:2014-08-12 22:07:34    阅读次数:218
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