YIQI521的博客

For strings S and T, we say "T divides S" if and only if S = T + ... + T(T concatenated with itself 1 or more times) Return the largest string X such that X divides str1and X divides str2. Input...

Given an input string (s) and a pattern (p), implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding element. T...

There is a fence with n posts, each post can be painted with one of the k colors. You have to paint all the posts such that no more than two adjacent fence posts have the same color. Return the tota...