LeetCode解题之Distinct Subsequences 原题 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能够删除它自己随意个字符。可是不能改变字符的相对位置。那一共同拥有多少种删法能够使S变为T。 注意点: 删除随意个字符包含不删除字符 样例: 输入: s = “r ...
分类:
其他好文 时间:
2017-07-22 18:26:09
阅读次数:
79
For a sequence a of n integers between 1 and m, inclusive, denote f(a) as the number of distinct subsequences of a (including the empty subsequence). ...
分类:
其他好文 时间:
2017-07-14 20:26:56
阅读次数:
228
Given a string S and a string T, count the number of distinct subsequences ofT inS. A subsequence of a string is a new string which is formed from the ...
分类:
其他好文 时间:
2017-06-14 02:16:32
阅读次数:
263
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:
2017-05-29 21:09:30
阅读次数:
204
?? 题意 求母串中子串出现的次数(长度不超过1后面100个0 显然要用大数了) 令a为子串 b为母串 d[i][j]表示子串前i个字母在母串前j个字母中出现的次数 当a[i]==b[j]&&d[i-1][j-1]!=0时 d[i][j]=d[i-1][j-1]+d[i][j-1] (a[i]==b ...
分类:
其他好文 时间:
2017-05-28 22:31:10
阅读次数:
266
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 fro ...
分类:
其他好文 时间:
2017-05-25 15:49:58
阅读次数:
118
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:
2017-05-17 00:57:04
阅读次数:
229
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:
编程语言 时间:
2017-05-07 11:34:41
阅读次数:
191
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 fro ...
分类:
其他好文 时间:
2017-04-15 18:23:25
阅读次数:
178
题目: https://leetcode.com/problems/distinct-subsequences/?tab=Description 一般没有明显思路的情况下,都要想想DP,用下Divide-and-Conque 下面的思路很好,很清晰 https://discuss.leetcode. ...
分类:
其他好文 时间:
2017-02-26 01:15:05
阅读次数:
148