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codeforces 597C C. Subsequences(dp+树状数组)
题目链接: C. Subsequences For the given sequence with n different elements find the number of increasing subsequences with k?+?1 elements. It is guarantee ...
分类:编程语言   时间:2016-03-24 19:56:27    阅读次数:368
lintcode-medium-Distinct Subsequences
Given a string S and a string T, count the number of distinct subsequences of T in S. A subsequence of a string is a new string which is formed from t
分类:其他好文   时间:2016-03-20 08:09:33    阅读次数:194
[LeetCode]题解(python):115-Distinct Subsequences
题目来源: https://leetcode.com/problems/distinct-subsequences/ 题意分析: 给定字符串S和T,判断S中可以组成多少个T,T是S的子串。 题目思路: 这是一个动态规划的问题。设定ans[i][j]为s[:i] 组成t[:j]的个数。那么动态规划方程
分类:编程语言   时间:2016-03-10 23:39:35    阅读次数:584
LeetCode Distinct Subsequences
给定两个字符串S和T,求T有多少种从属于S的子序列的情况。或者说S可以删除它自己任意个字符,但是不能改变字符的相对位置,那一共有多少种删法可以使S变为T。...
分类:其他好文   时间:2016-03-10 10:55:49    阅读次数:117
LightOJ 1085(树状数组+离散化+DP,线段树)
All Possible Increasing Subsequences Time Limit:3000MS Memory Limit:65536KB 64bit IO Format:%lld & %llu Appoint description: Description An increasing
分类:编程语言   时间:2016-02-25 15:12:17    阅读次数:177
LeetCode - Distinct Subsequences
题目:Given a string S and a string T, count the number of distinct subsequences of T in S.A subsequence of a string is a new string which is formed from...
分类:其他好文   时间:2016-01-13 15:35:34    阅读次数:137
Distinct Subsequences
Given a string S and a string T, count the number of distinct subsequences of T in S.A subsequence of a string is a new string which is formed from th...
分类:其他好文   时间:2016-01-09 06:17:34    阅读次数:149
codeforces 597C - Subsequences
枚举子序列的末尾,递推。方案数:f[i = 以i结尾][k =子序列长度] = sum(f[j][k-1]),j using namespace std;typedef long long ll;const int N = 1e5+5, K = 10;ll C[K][N];ll sum(ll C[]...
分类:其他好文   时间:2015-12-20 13:16:43    阅读次数:239
[LeetCode] Distinct Subsequences 解题思路
问题:给定字符串 S, T, 求 T 在 S 中有多少个不同的子序列。 一开始看到这道题,没有思路,在网上看了别人的解答才了解到如何解题。这是一道 dp 题,如果能想得到状态转义 关系,答案就比较明显了。解法有点想 背包问题的解法。 二维数组 vv[T.len][S.len] 存储中间结果。 vv[...
分类:其他好文   时间:2015-12-14 23:17:23    阅读次数:168
115.Distinct Subsequences
Given a stringSand a stringT, count the number of distinct subsequences ofTinS.A subsequence of a string is a new string which is formed from the orig...
分类:其他好文   时间:2015-12-14 18:20:25    阅读次数:131
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