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CareerCup之1.3字符串去重
【题目】原文:1.3 Design an algorithm and write code to remove the duplicate characters in a string without using any additional buffer. NOTE: One or two add...
分类:其他好文   时间:2014-06-02 21:32:04    阅读次数:284
UESTC 887 方伯伯的儿童节
树形DP问题。定义:1.dp[u][1]表示u这个点设立糖果发放点且u这棵子树满足条件时的最少糖果点数2.dp[u][0]表示u这个点不设立发放点且u这棵子树满足条件时的最少糖果点数设v1,v2……vn为u的子节点,则转移方程:dp[u][1]= sum(min(dp[vi][1],dp[vi][0...
分类:其他好文   时间:2014-06-02 20:35:30    阅读次数:262
UESTC 886 方老师金币堆
环状合并石子问题。环状无非是第n个要和第1个相邻。可以复制该行石子到原来那行的右边即可达到目的。定义:dp[i][j]代表从第i堆合并至第j堆所要消耗的最小体力。转移方程:dp[i][j]=min(dp[i][k]+dp[k+1][j]+sum[i][j]);复杂度:O(n^3)。可考虑四边形优化。...
分类:其他好文   时间:2014-06-02 20:34:03    阅读次数:226
UESTC 876 爱管闲事
题意:即求给定n个数字(a1,a2,……an),不改变序列,分成M份,使每一份和的乘积最大。思路:dp[i][j]表示把前i个数字,分成j份所能得到的最大乘积。转移方程:dp[i][j] = max{ dp[k][i-1]*sum(k+1,j) } 其中显然j#include #include #i...
分类:其他好文   时间:2014-06-02 19:58:45    阅读次数:242
几道算法题
1.Problem DescriptionGiven a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-...
分类:其他好文   时间:2014-06-02 17:36:53    阅读次数:234
【LeetCode】Merge Sorted Array
Merge Sorted ArrayGiven two sorted integer arrays A and B, merge B into A as one sorted array.Note: You may assume that A has enough space (size that ...
分类:其他好文   时间:2014-06-01 12:04:32    阅读次数:175
ZJ2008树的统计(树链剖分)
type node1=record go,next:longint;end; node2=record l,r,mx,sum:longint;end;var i,x,y,n,q,tmp,cnt,sz,code:longint; ch,st:string; fa:a...
分类:其他好文   时间:2014-06-01 11:45:18    阅读次数:374
LeetCode: Scramble String [87]
【题目】 Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. Below is one possible representation of s1 = "great": great / gr eat / \ / g r e at / ...
分类:其他好文   时间:2014-06-01 09:41:05    阅读次数:196
LeetCode: Merge Sorted Array [088]
【题目】 Given two sorted integer arrays A and B, merge B into A as one sorted array. Note: You may assume that A has enough space (size that is greater or equal to m + n) to hold additional elements from B. The number of elements initialized in A and B are...
分类:其他好文   时间:2014-06-01 09:21:16    阅读次数:292
projecteuler---->problem=13----Large sum
title: Work out the first ten digits of the sum of the following one-hundred 50-digit numbers. 37107287533902102798797998220837590246510135740250 4637693767749000971264812489697007805041701826053...
分类:其他好文   时间:2014-06-01 08:53:33    阅读次数:276
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