---
# System prepended metadata

title: 2020-08-28 A+ OfficeHour

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# 2020-08-28 A+ OfficeHour

## 36. Valid Sudoku (M)
![](https://i.imgur.com/CbOsLcC.jpg)

## 442. Find All Duplicates (M).jpg
![](https://i.imgur.com/7EVHCTv.jpg)

## 316. Remove Duplicate Let (H).jpg
![](https://i.imgur.com/sMv4JcH.jpg)


