# TODO list

List of unsolved problems that I should try again later. Putting everything here to clean
my tabs

*Contents*
* [Codeforces](#TODO list#Codeforces)
        * [Divs](#TODO list#Codeforces#Divs)
                * [Educational](#TODO list#Codeforces#Divs#Educational)
                * [Div 1/2](#TODO list#Codeforces#Divs#Div 1/2)
                * [Div 4](#TODO list#Codeforces#Divs#Div 4)
        * [GYM](#TODO list#Codeforces#GYM)
                * [ICPC Brazil first phase](#TODO list#Codeforces#GYM#ICPC Brazil first phase)
* [Atcoder](#TODO list#Atcoder)

## Codeforces

Problem from codeforces.

### Divs

Official divs from codeforces

#### Educational

1. [F. Frogs and Mosquitoes](https://codeforces.com/contest/609/problem/F)

	I have no clue where to even start.

2. [E. Water Taps](https://codeforces.com/contest/954/problem/E)

	I have an idea, but it's really annoying to solve it.

3. [F. Fibonacci String Subsequences](https://codeforces.com/contest/946/problem/F)

	Obviously DP, but not sure how to do it...

4. [F. Imbalance Value of Tree](https://codeforces.com/contest/915/problem/F)

	Tree problem, looks interesting.

5. [F. Clear The Matrix](https://codeforces.com/contest/903/problem/F)

	DP with optimization?

#### Div 1/2

1. [D. Division Versus Addition](https://codeforces.com/contest/2152/problem/D)

	The idea is simple, but I have to think through it better.

2. [D2. Inversion Graph Coloring](https://codeforces.com/contest/2143/problem/D2)

	DP with optimization.

3. [E. Yet Another MEX Problem](https://codeforces.com/contest/2146/problem/E)

	Maybe MEX with two pointers?	

4. [D. A Cruel Segment's Thesis](https://codeforces.com/contest/2140/problem/D)

	Looks greedy.

5. [F. Flint and Steel](https://codeforces.com/contest/2133/problem/F)

	I tried this a long time ago, don't remember what it's about, just remembered
	that I tried a greedy solution and it didn't work.

#### Div 3

1. [G. Cry Me a River](https://codeforces.com/contest/2137/problem/G)

	Graph problem, don't remember the details.

#### Div 4

1. [F. Gravity Falls](https://codeforces.com/contest/2148/problem/F)

	I barely read it, not sure were I found it either, but looks pretty easy.

### GYM

Gym from simulations or contests that I did

#### ICPC Brazil first phase

1. [D. Dominoes](https://codeforces.com/gym/106073/problem/D)

	If I did this one, I would have passed into second phase, must try to solve it
	ASAP.

#### ICPC Northwestern European Regional

[Link](https://codeforces.com/gym/104875) because it has no problem page in gym.

1. L. Last Guess

	I think I can solve it with flow.

#### USP Try-outs

1. [B. Tuk-Tuk Express](https://codeforces.com/gym/103934/problem/B)

	I have NO clue why my code keeps getting WA, awful implementation problem.

2. [J. Apep, the Lord of Chaos](https://codeforces.com/gym/103934/problem/J)

	I don't remember what the problem was about, I just know that I tried it before.

## Atcoder

1. [F. Operate K](https://atcoder.jp/contests/abc386/tasks/abc386_f)

	DP with optimization.