Determine if a 9 x 9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules:

You are given a rectangular cake of size h x w and two arrays of integers horizontalCuts and verticalCuts where

You are given two strings order and s. All the words of order are unique and were sorted in some custom order previously.

문자열 s 가 주어졌을 때 겹치는 문자가 없는 부분 문자열의 길이를 반환하라.

You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]).