There is a directed graph of n colored nodes and m edges. The nodes are numbered from 0 to n - 1. You are given a string colors where colors[i] is a lowercase English letter representing the color of the ith node in this graph (0-indexed). You are also given…

给你一个二进制字符串 s 和一个正整数 k 。 请你返回 s 的 最长 子序列的长度，且该子序列对应的 二进制 数字小于等于 k 。 注意：

You are given a binary string s and a positive integer k. Return the length of the longest subsequence of s that makes up a binary number less than or equal to k. Note:

n 名运动员参与一场锦标赛，所有运动员站成一排，并根据 最开始的 站位从 1 到 n 编号（运动员 1 是这一排中的第一个运动员，运动员 2 是第二个运动员，依此类推）。 锦标赛由多个回合组成（从回合 1 开始）。每一回合中，这一排从前往后数的第 i 名运动员需要与从后往前数的第 i 名运动员比拼，获胜者将会进入下一回合。如果当前回合中运动员数目为奇数，那么中间那位运动员将轮空晋级下一回合。

There is a tournament where n players are participating. The players are standing in a single row and are numbered from 1 to n based on their initial standing position (player 1 is the first player in the row, player 2 is the second player in the row, etc.).…

给你一个大小为 n x m 的二维整数矩阵 grid，其中每个元素的值为 0、1 或 2。 V 形对角线段 定义如下：

You are given a 2D integer matrix grid of size n x m, where each element is either 0, 1, or 2. A V-shaped diagonal segment is defined as:

给你一个整数 n，你需要重复执行多次下述操作将其转换为 0 ：

Given an integer n, you must transform it into 0 using the following operations any number of times: