Subsequence Count
Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 256000/256000 K (Java/Others)Total Submission(s): 304 Accepted Submission(s): 126
Problem Description
Given a binary string
S[1,...,N] (i.e. a sequence of 0's and 1's), and
Q queries on the string.
There are two types of queries:
1. Flipping the bits (i.e., changing all 1 to 0 and 0 to 1) between l and r (inclusive).
2. Counting the number of distinct subsequences in the substring S[l,...
There are two types of queries:
1. Flipping the bits (i.e., changing all 1 to 0 and 0 to 1) between l and r (inclusive).
2. Counting the number of distinct subsequences in the substring S[l,...

本文探讨如何使用动态规划(DP)和线段树进行区间更新,结合矩阵快速幂的性质,高效求解字符串子序列的数量问题。
最低0.47元/天 解锁文章
494

被折叠的 条评论
为什么被折叠?



