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# System prepended metadata

title: Problems from 26/07

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[toc]
# Codeforces
## Elo 800

### Daily challenge August SPyofgame
<details><summary>Info</summary>

![image](https://hackmd.io/_uploads/r1BO49oPxl.png)
</details>

### Contest STL Star
<details><summary>Info</summary>

Trong này có 13 bài 800, 3 bài còn lại để ở mục khác
![image](https://hackmd.io/_uploads/Hyqoe0hvgl.png)
</details>

### 2126A - Only one digit
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/2126/A
![image](https://hackmd.io/_uploads/HJrQfJjwxe.png)
</details>

### 2123B - Tournament
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/2123/B
![image](https://hackmd.io/_uploads/Hytjzkswxe.png)
</details>

### 2117A - False Alarm
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/2117/A
![image](https://hackmd.io/_uploads/H1Z4XyjPel.png)
</details>

### 2109A - It's time to duel
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/2109/A
![image](https://hackmd.io/_uploads/HJ-oQJiPel.png)
</details>

### 2123A - Blackboard game
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/2123/A
![image](https://hackmd.io/_uploads/r1QYnVoDgg.png)
</details>
    
### 1520B - Ordinary Numbers
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/1520/B
![image](https://hackmd.io/_uploads/HJ1QSKpvll.png)
</details>

### 2126B - No Casino In the Mountain
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/2126/B
![image](https://hackmd.io/_uploads/r1jDzYWOle.png)
</details>

### 2094A - Trippi Troppi
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/2094/A
![image](https://hackmd.io/_uploads/HJH6N_QOex.png)
</details>

## Elo 900
### New's year number
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/1475/B
![image](https://hackmd.io/_uploads/BJRUt9Tvxx.png)
</details>

### Radio Station
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/918/B
![image](https://hackmd.io/_uploads/Hk3w-Xx_lg.png)
</details>

## Elo 1300
### Registration System
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/4/C
![image](https://hackmd.io/_uploads/H1hVfXxuxe.png)
</details>

## Elo 1400
### T-shirts Buying
<details><summary>Info</summary>

https://codeforces.com/problemset/problem/799/B
![image](https://hackmd.io/_uploads/rknKMmgOxx.png)
</details>

# CSES
## Graph Algorithm
### Couting Rooms
<details><summary>Info</summary>

https://cses.fi/problemset/task/1192/
![image](https://hackmd.io/_uploads/SJJBNyjvll.png)
</details>

### Labyrinth
<details><summary>Info</summary>

https://cses.fi/problemset/task/1193/
![image](https://hackmd.io/_uploads/S1MuhZoDlg.png)
</details>

# VNOI
### Chọn bi
<details><summary>Info</summary>

https://oj.vnoi.info/problem/nd_thpt_2122_b
![image](https://hackmd.io/_uploads/HyVVSOQdle.png)
</details>

# EUIOJ
### Abundant Number
<details><summary>Info</summary>

https://oj.eiu.edu.vn/problem/abundant_number
![image](https://hackmd.io/_uploads/BymDCdQdgl.png)
</details>
