# 归档 2018年1月

## 题目描述：

LeetCode 766. Toeplitz Matrix

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 ...`

## LeetCode Weekly Contest 67解题报告 作者是 在线疯狂 发布于 2018年1月14日 在 LeetCode.

LeetCode Weekly Contest 67是LeetCode举办的第七十一场正式周赛，共4道题目，比赛时长1.5小时。

LeetCode 762. Prime Number of Set Bits in Binary Representation

LeetCode 763. Partition Labels

LeetCode 764. Largest Plus Sign

LeetCode 765. Couples Holding Hands

## 题目描述：

LeetCode 765. Couples Holding Hands

N couples sit in 2N seats arranged in a row and want to hold hands. We want to know the minimum number of swaps so that every couple is sitting side by side. A ...

## 题目描述：

LeetCode 764. Largest Plus Sign

In a 2D `grid` from (0, 0) to (N-1, N-1), every cell contains a `1`, except those cells in the given list `mines` which are `0`. What is the largest axis-aligned plus sign of ...

## 题目描述：

LeetCode 763. Partition Labels

A string `S` of lowercase letters is given. We want to partition this string into as many parts as possible so that each letter appears in at most one part, and return a list of ...