# 归档 2016年10月16日

## LeetCode Weekly Contest 9解题报告 作者是 在线疯狂 发布于 2016年10月16日 在 LeetCode.

LeetCode Weekly Contest 9是LeetCode举办的第八场正式周赛，共4道题目，比赛时长2.5小时。

LeetCode 422. Valid Word Square

LeetCode 423. Reconstruct Original Digits from English

LeetCode 424. Longest Repeating Character Replacement

LeetCode 425. Word Squares

## 题目描述：

LeetCode 425. Word Squares

Given a set of words (without duplicates), find all word squares you can build from them.

A sequence of words forms a valid word square if the kth row and column read the exact ...

## 题目描述：

LeetCode 424. Longest Repeating Character Replacement

Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Find the length of a longest substring containing ...

## 题目描述：

LeetCode 423. Reconstruct Original Digits from English

Given a non-empty string containing an out-of-order English representation of digits 0-9, output the digits in ascending order.

Note:

1. Input contains only lowercase English letters.
2. Input is guaranteed to be valid and ...

## 题目描述：

LeetCode 422. Valid Word Square

Given a sequence of words, check whether it forms a valid word square.

A sequence of words forms a valid word square if the kth row and column read the exact same string ...