Can anyone share some practice problem for Mo's Algo like i got 1 while practice https://codeforces.com/problemset/problem/1514/D

Any hint for this problem https://www.codingninjas.com/studio/contests/weekend-contest-101/10450257/problems/28331?leftPanelTabValue=PROBLEM

I was solving a problem from Leetcode https://leetcode.com/problems/count-pairs-of-points-with-distance-k/

In this problem i am only checking from (i to i+100) and it passed , i not have any proof how pair will exist only till i+100,can anyone provide any proof or intuition.

code : https://leetcode.com/submissions/detail/1051363856/

If you have segment tree problems in rating range 1800-2000, please share in this blog post, I seen few posts of CF but in that there are very few problems of these difficulty range.

Is Codeforces Judge is working?

In my vs code sometimes indentation automatically get shifted , like after while loop brackets when i click enter it should give 4 spaces but it give only 1 , and this error itself go in few hours. what is reason for this so i can fix it?

This question came in At coder begineer contest

https://atcoder.jp/contests/abc280/tasks/abc280_e

Can anyone Explain it

This problem came in Codechef Starters , i am confused with edotrial :

https://www.codechef.com/submit/TRIXOR

This Question logic implemenation is easy , but as test case is very large so it is not able to pass in 2 seconds even after Meomizing the answer.

Images :

https://imgur.com/gallery/anvdek1