ToDo: split the article later by topic.

Construct binary Tree from inorder and postorder leetcode problem link

cartesian tree problems in codeforces blog

Given an inorder traversal of a cartesian tree, construct the tree. following js meetup works on this on 09-06, here's the google doc with work on code from few members.

Woud this help?

```
int findInorderPosition(int[] inorder, int value, int start, int end) {
for (int i = start; i <= end; i++)
if (inorder[i] == value)
return i;
return -1;
}
```

dynamic programming find max sum from array, SO hint

codeforces String Problems and Solutions https://codeforces.com/blog/entry/49938

https://codeforces.com/problemset/problem/126/B https://codeforces.com/problemset/problem/471/D

segment tree (probably a solution on Battle with you know who) code link

- Contest 02 on 08-19 event link and solutions discussion article link

Problem set & Analysis from the Finals and Qualification rounds http://bubblecup.org/Content/Media/Booklet2018.pdf

Why does a = b (mod n) iff a - b is divisible by n? https://math.stackexchange.com/questions/1856128/why-does-a-b-mod-n-iff-a-b-is-divisible-by-n

may be related to some problem from innoworld https://codeforces.com/contest/455/problem/D

codeforces editorials on