will add some junk value if elements after $r+1$ are not paired up equally but
thosejunk values are, Note that $ans_l$ doesn't have any physical meaning because it will add some
junk value if elements
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1.
junk
Last visit:
10 years ago
Registered:
14 years ago
2.
Codeforces Round #793 (Div. 2) Editorial I hope you all liked the round. Please share your feedback in the comments section.
[1682A — Palindromic Indices](https://codeforces.com/contest/1682/problem/A)
===============================
<spoiler summary = "Hint">
Read the statement carefully!! The given string is a **palindrome**.
</spoiler>
<spoiler summary = "Tutorial">
Let's remove some index $i$ from the first half of $s$ and check whether the resulting string is a palindrome or not, the other half has the same approach. The prefix of length $i-1$ already matches with the suffix of the same length because the initial string was a palindrome, so we just need to check if $t = s[i + 1 \ldots n - i + 1]$ is a palindrome.
For $t$ to be a palindrome, $s_{n - i + 1}$ should be equal to $s_{i + 1}$ which was initially equal to $s_{n - i}$, again which should be equal to $s_{i + 2}$ and this goes on. Here we can see that $s_i = s_{i + 1} \ldots = s_{n - i + 1}$. So the answer is simply equal to the number ...
Tutorial of Codeforces Round 793 (Div. 2)
3.
Approach to 2D Segment Tree with Lazy Propogation (should allow RMQ?) I was going through many online blogs on 2D Subrectangle Queries and Updates using Lazy Propogation. I was surprised to find that Subtrectangle Minimum and Maximum Queries were not possible in sub-linear time.
This was probably because most 2D Data Structure approaches were based on Fixing an Origin, and then handling queries as<br><b> Q(x1, y1, x2, y2) {x1<=x2 and y1<=y2} = Q'(x2, y2)-Q'(x1, y2)-Q'(x2, y1)+Q'(x1, y1). </b> <br>
[This example shows Range Sum Query]. This is like basic 2D prefix sums but with segment trees/2D BIT to handle updates.
However, I came up with a different approach. [Please note that there is some bug in the codes right now which is taking too long to debug, so I thought I'd first ask if I'm on the right track here before I spend more time debugging as I've already spent a whole day working on this.]
<br>
Since we are maintaining a Segment Tree of Rows where each Segment Tree holds another Segment Tree for columns, I went with the naive approach. No...
down. Notice how calling querry function in a junk variable lazyupd helps to
propogate updates for, Finally I come to queries. We do the junk variable based lazy propogation here
too. The rest is, junk variable lazyupd helps to propogate updates for all nodes we visit (logN
for each update on idx).
4.
[Tutorial] Centroid Decomposition again # Hello, 20llmc! Your recent comments/blog posts/other activities have violated rules of our community. It seems this content is nonsensical, troll-like, dirty, coarse, offensive, aggressive, meaningless, violating other rules or ethical norms. Probably, it wasn’t written in English (or Russian if you specify this language for blog post or comment). Please, be polite, reasoned, do not publish junk content, do not violate conventional ethical standards. You should not publish content that does not correspond to the topic of discussion or does not correspond to the topic of the website. Use common sense when analyzing to write or not write any content. You should not publish comic content, especially if it is not interesting to a wide part of the audience, repeats the existing one, or has no connection with competitive programming. Your account has been blocked to write any social content for 48 hours and your recent content has been deleted. Hope you follow the relevant conclusions and ...
junk content, do not violate conventional ethical standards. You should not
publish content that
5.
Anti obfuscation check There are multiple blogs showing that some users get away with cheating by obfuscating their code, so codeforces really needs to check if a submission is obfuscated. It looks like the cheaters copy a solution and they put each line/token in a define, with a lot of junk in between. This is currently being handled on a case by case basis, which is a problem
~~~~~
/*Example*/
#include <iostream>
#define awhHRUTH1x using
#define b589AHWUin namespace
#define iuhA2781AB std;
#define v1895Krnba int
#define bATT68125F main(
#define bba5891AW4 ){
#define JKT15jyT51 cout<<
#define abb151A5h1 "HelloWorld\n";
#define Uikta5UUNW return
#define bbbqrgq214 0;
#define btpIOUHBWW }
awhHRUTH1x b589AHWUin iuhA2781AB
/*#define aiw uahiuwhha ruahwihaiuwhviunpawrry1pqrawu;*/
/*int gcd(int a,int b) return a+b;*/
/*im not sure if this compiles*/
v1895Krnba bATT68125F bba5891AW4 JKT15jyT51 abb151A5h1 Uikta5UUNW bbbqrgq214 btpIOUHBWW
~~~~~
Right now, as most of these solutions are a...
solution and they put each line/token in a define, with a lot of junk in
between. This is currently, , checking the code after it gets preprocessed (remove defines and comments) so
that thejunk won't
6.
SPOJ — What the...? I want to tell a curious story that happened to me while solving a problem on SPOJ. It happened a few days ago.
- Solved a problem. Submitted the code. Result: **WA**.
- I, being pretty sure that my solution was correct and knowing that SPOJ's checker is an abomination, decided to resubmit the **exact** same code, only seconds apart from my first submission. Result: **AC**.
- Not happy enough, I decided to test the unstable system of SPOJ. So I submitted the same code, for the third time. As I expected, the junk that SPOJ use went haywire again, and result was **WA**.
This was obviously not the first time I had problems with SPOJ and its rusty short-circuited servers. Every single time I want to solve a problem there, I know what's coming. I expect lots of unstable testing and false WA's.
So, I've made up my mind. From now on, or at least until SPOJ staff decide to do something about that junkyard they use, I'll only use SPOJ if I want to solve a problem that's not on **any*...
, the junk that SPOJ use went haywire again, and result was **WA**., . As I expected, the junk that SPOJ use went haywire again, and result was
**WA**. This was
7.
Why does my code read junk bits? I've made a [submission](https://codeforces.com/contest/1303/submission/71603217) to problem [1303D](https://codeforces.com/contest/1303/problem/D). I get a correct answer when I iterate upto 30 bit positions, but, according to the constraints in the question, I've to iterate upto 60 (n: 1e18). I don't understand why the code reads junk bits (and hence increments variable splits) thus giving a WA.
Why does my code read junk bits?, don't understand why the code reads junk bits (and hence increments variable
splits) thus giving a WA.
8.
postbanned Hello, pathetique! Your recent comments/blog posts/other activities have violated rules of our community. It seems this content is nonsensical, troll-like, dirty, coarse, offensive, aggressive, meaningless, violating other rules or ethical norms. Probably, it wasn’t written in English (or Russian if you specify this language for blog post or comment). Please, be polite, reasoned, do not publish junk content, do not violate conventional ethical standards. You should not publish content that does not correspond to the topic of discussion or does not correspond to the topic of the website. Use common sense when analyzing to write or not write any content. You should not publish comic content, especially if it is not interesting to a wide part of the audience, repeats the existing one, or has no connection with competitive programming. Your account has been blocked to write any social content for 48 hours and your recent content has been deleted. Hope you follow the relevant conclusions an...
junk content, do not violate conventional ethical standards. You should not
publish content that does
9.
Lmao I got censored again Hello dear codeforcians.
As you may know, I am known for not so kind and heartwarming content. However, in recent times, I have teied to make a turn for that and create better content for the community.
But I can't help myself.
As you may very possibly know, recently, a problem was stolen directly from a contest. And as such, I thought it was my time to be mean, as usual. And so I started. And.. everyone mainly agreed with me, because obviously, being mean about something bad should mean that you are trying to memorably traumatise the wrongdoers as to never do such a thing again. But, not everyone agreed with me, especially management. As such, I receives my 5th one of these
> Hello bleahbleah! Your recent comments/blog posts/other activities have violated rules of our community. It seems this content is nonsensical, troll-like, dirty, coarse, offensive, aggressive, meaningless, violating other rules or ethical norms. Probably, it wasn’t written in English (or Russian if yo...
you specify this language for blog post or comment). Please, be polite,
reasoned, do not publishjunk, junk content, do not violate conventional ethical standards. You should not
publish content that
10.
Help required in debugging solution for problem 160D (Edges on MST) Hi codeforces!
I have been trying this problem (160 D) for quite some while now, and my solution repeatedly TLEs on test case 22. (specifically a case where there are 1e5 edges and all edges are of the same weight.) I have tried debugging it for quite some while now, but am absolutely clueless as to why it TLEs. Could someone please help me out with it?
I am bluntly attaching my code here, which I have commented a bit in an attempt to make it appear a little less junk.
Though my code is commented, I am willing to explain any part of my solution in case someone wants it. Any sort of help will be appreciated. :)
Solution Link: [95615534](http://codeforces.com/contest/160/submission/95615534)
PS: Yeah, I hate debugging blogs too, but please have a look at my solution once before downvoting. :) thx.
little less junk. Though my code is commented, I am willing to explain any
part of my solution in, , which I have commented a bit in an attempt to make it appear a little less
junk. Though my code is
11.
Спам от CodeForces С недавних пор у меня <a href="http://www.mozilla-russia.org/products/thunderbird/"><b>Thunderbird</b></a> трактует письма от <b>CodeForces</b> как <b><a href="http://translate.google.ru/#en%7Cru%7Cjunk%0D%0A">Junk</a> (Спам) Mail </b>и удаляет.<br>Собственно настройки не трогал, со спам фильтрами не играл, они вообще обновляются через инет, поэтому и копаться там смысла нет.<br>С чего вдруг такое счастье? У одного ли меня такое происходит?
%7Cru%7Cjunk%0D%0A">Junk (Спам) Mail и удаляет.
Собственно настройки не трогал, со спам
12.
MY REAL CODING JOURNEY Finally the time is here , unlimited problems real coding world ,i am just a piece of junk between these great coders around
as of now but this is getting real interesting like i think i am going at a great speed for a beginner but this isnt enough
hopefully i would complete minimum 3 programs per day!!!!!!!!!!!.
by the way its my first blog yoyyyy!!!.
Finally the time is here , unlimited problems real coding world ,i am just a
piece ofjunk between
13.
U.S. Trashes Afghanistan Gear, Angering Afghans Who Could Use Equipment U.S. Trashes Afghanistan Gear, Angering Afghans Who Could Use Equipment
<a href="http://ahmwsj.net">louis vuitton outlet </a> KANDAHAR, Afghanistan -- KANDAHAR, Afghanistan (AP) — The withdrawing U.S. military is destroying most of the equipment it is leaving behind in Afghanistan after 13 years of war, selling the scrap for millions of dollars to those willing to buy it.<br />
The policy stands in stark contrast to the Americans' withdrawal from Iraq, when they donated or sold still-usable items worth about $100 million.<br />
<a href="http://ahmwsj.net">louis vuitton outlet online </a> The twisted mounds of metal, steel and industrial rubber scattered over a vast field had once been armored vehicles, trucks and huge blast walls that protected troops from suicide bombers. Giant black treads were pulled from tanks. Even air conditioners, exercise machines and office equipment were crushed and stuffed into multicolored shipping containers piled on top of each other...
of junk, said the contents can be kind of a lottery.
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