A matrix is Toeplitz if every diagonal from top-left to bottom-right has the same element. Now given an M x N matrix, return True if and only if the matrix is Toeplitz. Example 1: Input: matrix = [ [1,2,3,4], [5,1,2,3], [9,5,1,2] ] Output: True
Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 26694 Accepted: 11720 Description There are N villages, which are numbered from 1 to N, and you should build some roads such that every two villages can connect to each other. We say two
leetcode python solution 1. two sum (easy) Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution. Example: Given nums = [2, 7, 11, 15],
# -*- coding: utf8 -*-'''https://oj.leetcode.com/problems/container-with-most-water/ Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai).n vertical lines are drawn such that the two endpoints of line i i
Python 位操作: 按位与 &, 按位或 | 体会不到 按位异或 ^ num ^ num = 0 左移 << num << 1 == num * 2**1 右移 >> num >> 2 == num / 2**2 取反 ~ ~num == -(num + 1) 1. Single Number Given an array of integers, every element appears twice except for one. Find