I can't find many nice problems, so please drop some problems even if it's naive!
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Maybe this would be helpful :)
https://codeforces.net/blog/entry/134747
thanks :)
So why are these to articles so simlar?
Sorry, my English skills are too bad，so I have to copy others.
The difficulty of problems that I acquire is not same to that post.
But that's not the reason to copy others.
You're right, but I have already obtained the consent of the original author.
Prove it.
Well, he is my friend, so I won't mind it:)
https://codeforces.net/contest/2001/problem/E1
A simple DP, I nearly solved it during the contest.
thanks.
https://codeforces.net/problemset/problem/1916/D
Best problem ever
https://codeforces.net/contest/1770/problem/C
1921E - Съесть фишку
https://codeforces.net/contest/1841/problem/C not favorite though but it's a good problem ig.
https://codeforces.net/contest/1559/problem/D2 , This one is a really nice problem and there is a really nice approach using two pointers in the comments
I would like to recommend some problems:
1097F - Алексей и телешоу
627D - Тестирование дерева
1657F - Слова на дереве
1292D - Хаотичная В. — This one is actually 2700 but I recommend it because of the quite easy approach using virtual tree.
i leave this in almost every similar post,
1714F - Построй дерево и точка,
also here are some good graph/trees problems:
2000G - Звонок во время пути
1000E - Нужно больше боссов
2014F - Защита шерифа
1092E - Лес минимального диаметра
1970G1 - Min-Fund Prison (Easy)
1970G2 - Min-Fund Prison (Medium) & 1970G3 - Min-Fund Prison (Hard) (although i didn't solved them)
1092F - Дерево максимальной стоимости
1991E - Игра с раскрасками
https://codeforces.net/problemset/problem/718/C a nice segment tree problem
This problem managed to make me enjoy segment tree shenanigans
446C - DZY любит числа Фибоначчи
1503C - Travelling Salesman Problem
1977C — Nikita and LCM
I think it is a nice problem.
thanks.
1776J — Italian data centers
It would be good if you do something like a public google sheet where you put the problems the you are collecting from the comments section. btw, here is a problem that uses a well-known idea, so I think it's good to keep it in mind.
https://codeforces.net/contest/1996/problem/F
thanks.