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Contests & Programs AMC and other contests, summer programs, etc.
AMC and other contests, summer programs, etc.
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Contests & Programs AMC and other contests, summer programs, etc.
AMC and other contests, summer programs, etc.
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k a June Highlights and 2025 AoPS Online Class Information
jlacosta   0
Jun 2, 2025
Congratulations to all the mathletes who competed at National MATHCOUNTS! If you missed the exciting Countdown Round, you can watch the video at this link. Are you interested in training for MATHCOUNTS or AMC 10 contests? How would you like to train for these math competitions in half the time? We have accelerated sections which meet twice per week instead of once starting on July 8th (7:30pm ET). These sections fill quickly so enroll today!

[list][*]MATHCOUNTS/AMC 8 Basics
[*]MATHCOUNTS/AMC 8 Advanced
[*]AMC 10 Problem Series[/list]
For those interested in Olympiad level training in math, computer science, physics, and chemistry, be sure to enroll in our WOOT courses before August 19th to take advantage of early bird pricing!

Summer camps are starting this month at the Virtual Campus in math and language arts that are 2 - to 4 - weeks in duration. Spaces are still available - don’t miss your chance to have a transformative summer experience. There are middle and high school competition math camps as well as Math Beasts camps that review key topics coupled with fun explorations covering areas such as graph theory (Math Beasts Camp 6), cryptography (Math Beasts Camp 7-8), and topology (Math Beasts Camp 8-9)!

Be sure to mark your calendars for the following upcoming events:
[list][*]June 5th, Thursday, 7:30pm ET: Open Discussion with Ben Kornell and Andrew Sutherland, Art of Problem Solving's incoming CEO Ben Kornell and CPO Andrew Sutherland host an Ask Me Anything-style chat. Come ask your questions and get to know our incoming CEO & CPO!
[*]June 9th, Monday, 7:30pm ET, Game Jam: Operation Shuffle!, Come join us to play our second round of Operation Shuffle! If you enjoy number sense, logic, and a healthy dose of luck, this is the game for you. No specific math background is required; all are welcome.[/list]
Our full course list for upcoming classes is below:
All classes run 7:30pm-8:45pm ET/4:30pm - 5:45pm PT unless otherwise noted.

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0 replies
jlacosta
Jun 2, 2025
0 replies
k i Adding contests to the Contest Collections
dcouchman   1
N Apr 5, 2023 by v_Enhance
Want to help AoPS remain a valuable Olympiad resource? Help us add contests to AoPS's Contest Collections.

Find instructions and a list of contests to add here: https://artofproblemsolving.com/community/c40244h1064480_contests_to_add
1 reply
dcouchman
Sep 9, 2019
v_Enhance
Apr 5, 2023
k i Zero tolerance
ZetaX   49
N May 4, 2019 by NoDealsHere
Source: Use your common sense! (enough is enough)
Some users don't want to learn, some other simply ignore advises.
But please follow the following guideline:


To make it short: ALWAYS USE YOUR COMMON SENSE IF POSTING!
If you don't have common sense, don't post.


More specifically:

For new threads:


a) Good, meaningful title:
The title has to say what the problem is about in best way possible.
If that title occured already, it's definitely bad. And contest names aren't good either.
That's in fact a requirement for being able to search old problems.

Examples:
Bad titles:
- "Hard"/"Medium"/"Easy" (if you find it so cool how hard/easy it is, tell it in the post and use a title that tells us the problem)
- "Number Theory" (hey guy, guess why this forum's named that way¿ and is it the only such problem on earth¿)
- "Fibonacci" (there are millions of Fibonacci problems out there, all posted and named the same...)
- "Chinese TST 2003" (does this say anything about the problem¿)
Good titles:
- "On divisors of a³+2b³+4c³-6abc"
- "Number of solutions to x²+y²=6z²"
- "Fibonacci numbers are never squares"


b) Use search function:
Before posting a "new" problem spend at least two, better five, minutes to look if this problem was posted before. If it was, don't repost it. If you have anything important to say on topic, post it in one of the older threads.
If the thread is locked cause of this, use search function.

Update (by Amir Hossein). The best way to search for two keywords in AoPS is to input
[code]+"first keyword" +"second keyword"[/code]
so that any post containing both strings "first word" and "second form".


c) Good problem statement:
Some recent really bad post was:
[quote]$lim_{n\to 1}^{+\infty}\frac{1}{n}-lnn$[/quote]
It contains no question and no answer.
If you do this, too, you are on the best way to get your thread deleted. Write everything clearly, define where your variables come from (and define the "natural" numbers if used). Additionally read your post at least twice before submitting. After you sent it, read it again and use the Edit-Button if necessary to correct errors.


For answers to already existing threads:


d) Of any interest and with content:
Don't post things that are more trivial than completely obvious. For example, if the question is to solve $x^{3}+y^{3}=z^{3}$, do not answer with "$x=y=z=0$ is a solution" only. Either you post any kind of proof or at least something unexpected (like "$x=1337, y=481, z=42$ is the smallest solution). Someone that does not see that $x=y=z=0$ is a solution of the above without your post is completely wrong here, this is an IMO-level forum.
Similar, posting "I have solved this problem" but not posting anything else is not welcome; it even looks that you just want to show off what a genius you are.

e) Well written and checked answers:
Like c) for new threads, check your solutions at least twice for mistakes. And after sending, read it again and use the Edit-Button if necessary to correct errors.



To repeat it: ALWAYS USE YOUR COMMON SENSE IF POSTING!


Everything definitely out of range of common sense will be locked or deleted (exept for new users having less than about 42 posts, they are newbies and need/get some time to learn).

The above rules will be applied from next monday (5. march of 2007).
Feel free to discuss on this here.
49 replies
ZetaX
Feb 27, 2007
NoDealsHere
May 4, 2019
Polar Math Olympiad!
heheman   4
N 27 minutes ago by maxamc
Hello everyone your invited to the 1st weekly Polar Math Olympiad!!

Registration Form: https://docs.google.com/forms/d/1vjeFzYwTBOvWmA1nn8nOQ5CR9DA5DxdRjSs6ffcWrDw/edit

Test link: https://docs.google.com/document/d/1FSMpkhRYDIOQPZQJC2URJaj9nMHDeNSTno51s_DTrE8/edit?tab=t.0

Submission Form: https://docs.google.com/forms/d/1vjeFzYwTBOvWmAe1n8nOQ5CR9DA5DxdRjSs6ffcWrDw/edit

Backup: [url]file:///C:/Users/goonboy/Downloads/PolarMathOlympiad.pdf[/url]

Hope you enjoy my weekly contest!

4 replies
heheman
an hour ago
maxamc
27 minutes ago
Mustang Math Recruitment is Open!
MustangMathTournament   24
N an hour ago by golden_star_123
The Interest Form for joining Mustang Math is open!

Hello all!

We're Mustang Math, and we are currently recruiting for the 2025-2026 year! If you are a high school or college student and are passionate about promoting an interest in competition math to younger students, you should strongly consider filling out the following form: https://link.mustangmath.com/join. Every member in MM truly has the potential to make a huge impact, no matter your experience!

About Mustang Math

Mustang Math is a nonprofit organization of high school and college volunteers that is dedicated to providing middle schoolers access to challenging, interesting, fun, and collaborative math competitions and resources. Having reached over 4000 U.S. competitors and 1150 international competitors in our first six years, we are excited to expand our team to offer our events to even more mathematically inclined students.

PROJECTS
We have worked on various math-related projects. Our annual team math competition, Mustang Math Tournament (MMT) recently ran. We hosted 8 in-person competitions based in Washington, NorCal, SoCal, Illinois, Georgia, Massachusetts, Nevada and New Jersey, as well as an online competition run nationally. In total, we had almost 900 competitors, and the students had glowing reviews of the event. MMT International will once again be running later in August, and with it, we anticipate our contest to reach over a thousand students.

In our classes, we teach students math in fun and engaging math lessons and help them discover the beauty of mathematics. Our aspiring tech team is working on a variety of unique projects like our website and custom test platform. We also have a newsletter, which, combined with our social media presence, helps to keep the mathematics community engaged with cool puzzles, tidbits, and information about the math world! Our design team ensures all our merch and material is aesthetically pleasing.

Some highlights of this past year include 1000+ students in our classes, AMC10 mock with 150+ participants, our monthly newsletter to a subscriber base of 6000+, creating 8 designs for 800 pieces of physical merchandise, as well as improving our custom website (mustangmath.com, 20k visits) and test-taking platform (comp.mt, 6500+ users).

Why Join Mustang Math?

As a non-profit organization on the rise, there are numerous opportunities for volunteers to share ideas and suggest projects that they are interested in. Through our organizational structure, members who are committed have the opportunity to become a part of the leadership team. Overall, working in the Mustang Math team is both a fun and fulfilling experience where volunteers are able to pursue their passion all while learning how to take initiative and work with peers. We welcome everyone interested in joining!

More Information

To learn more, visit https://link.mustangmath.com/RecruitmentInfo. If you have any questions or concerns, please email us at contact@mustangmath.com.

https://link.mustangmath.com/join
24 replies
MustangMathTournament
May 24, 2025
golden_star_123
an hour ago
Tricky FE
Rijul saini   11
N 2 hours ago by MathLuis
Source: LMAO 2025 Day 1 Problem 1
Let $\mathbb{R}$ denote the set of all real numbers. Find all functions $f : \mathbb{R} \to \mathbb{R}$ such that
$$f(xy) + f(f(y)) = f((x + 1)f(y))$$for all real numbers $x$, $y$.

Proposed by MV Adhitya and Kanav Talwar
11 replies
Rijul saini
Wednesday at 6:58 PM
MathLuis
2 hours ago
Bisectors in BHC,... Find \alpha+\beta+\gamma
NO_SQUARES   1
N 2 hours ago by Diamond-jumper76
Source: Kvant 2025, no.4 M2840; 46th Tot
The altitudes $AA_1$, $BB_1$, $CC_1$ of an acute-angled triangle $ABC$ intersect at point $H$. The bisectors of angles $B$ and $C$ of triangle $BHC$ meet the segments $CH$ and $BH$ at points $X$ and $Y$ respectively. Denote the value of the angle $XA_1Y$ by $\alpha$. Define $\beta$ and $\gamma$ similarly. Find the sum $\alpha+\beta+\gamma$.
A. Doledenok
1 reply
NO_SQUARES
Yesterday at 2:12 PM
Diamond-jumper76
2 hours ago
Might be slightly generalizable
Rijul saini   7
N 2 hours ago by YaoAOPS
Source: India IMOTC Day 3 Problem 1
Let $ABC$ be an acute angled triangle with orthocenter $H$ and $AB<AC$. Let $T(\ne B,C, H)$ be any other point on the arc $\stackrel{\LARGE\frown}{BHC}$ of the circumcircle of $BHC$ and let line $BT$ intersect line $AC$ at $E(\ne A)$ and let line $CT$ intersect line $AB$ at $F(\ne A)$. Let the circumcircles of $AEF$ and $ABC$ intersect again at $X$ ($\ne A$). Let the lines $XE,XF,XT$ intersect the circumcircle of $(ABC)$ again at $P,Q,R$ ($\ne X$). Prove that the lines $AR,BC,PQ$ concur.
7 replies
Rijul saini
Wednesday at 6:39 PM
YaoAOPS
2 hours ago
[$26K+ in PRIZES AND IVY LEAGUE MENTORSHIP] AASF Youth Ambassador for Science
petfoo   4
N 2 hours ago by heheman
Hey everyone! Just made this post to share something that meant a lot to me last summer.

I participated in the Youth Ambassador for Science competition hosted by the Asian American Scholar Forum. It’s open to high school students (14–18), and it’s super simple (and free) to enter:

You make a short video about one of five Asian American science pioneers, post it on social media with their hashtag (#aasf_contest), and fill out a quick submission form.

What I got out of it last year:
[list][*] I won a $500 VISA gift card
[*] Got invited to the Asian American Pioneer Medal Symposium at Stanford University
[*]Met Fortune 500 CEOs (Founder of Zoom), professors from top schools (many from Princeton and Stanford), and even a Nobel Prize winner (current professor at Berkeley)
[*]And received 1-on-1 mentoring sessions with a Princeton professor[/list]

It was honestly one of the highlights of my summer. This year, I’m helping spread the word so more students can benefit.

If you’re into science, public speaking, social impact, or just want to connect with some inspiring people, I 100% recommend going for it.

:!: Deadline to apply: June 30, 2025
:arrow: More Info: aasforum.org/video-competition

p.s. i'm a rising freshman at one of the hypsm schools, so i'm sure the contest helped there as well :) have fun!
4 replies
petfoo
Wednesday at 3:27 PM
heheman
2 hours ago
Iranian tough nut: AA', BN, CM concur in Gergonne picture
grobber   69
N 2 hours ago by zuat.e
Source: Iranian olympiad/round 3/2002
Let $ABC$ be a triangle. The incircle of triangle $ABC$ touches the side $BC$ at $A^{\prime}$, and the line $AA^{\prime}$ meets the incircle again at a point $P$. Let the lines $CP$ and $BP$ meet the incircle of triangle $ABC$ again at $N$ and $M$, respectively. Prove that the lines $AA^{\prime}$, $BN$ and $CM$ are concurrent.
69 replies
grobber
Dec 29, 2003
zuat.e
2 hours ago
Inspired by current year (2025)
Rijul saini   4
N 2 hours ago by Rg230403
Source: India IMOTC 2025 Day 4 Problem 1
Let $k>2$ be an integer. We call a pair of integers $(a,b)$ $k-$good if \[0\leqslant a<k,\hspace{0.2cm} 0<b \hspace{1cm} \text{and} \hspace{1cm} (a+b)^2=ka+b\]Prove that the number of $k-$good pairs is a power of $2$.

Proposed by Prithwijit De and Rohan Goyal
4 replies
Rijul saini
Wednesday at 6:46 PM
Rg230403
2 hours ago
Write down sum or product of two numbers
Rijul saini   2
N 3 hours ago by Rg230403
Source: India IMOTC Practice Test 2 Problem 3
Suppose Alice's grimoire has the number $1$ written on the first page and $n$ empty pages. Suppose in each of the next $n$ seconds, Alice can flip to the next page, and write down the sum or product of two numbers (possibly the same) which are already written in her grimoire.

Let $F(n)$ be the largest possible number such that for any $k < F(n)$, Alice can write down the number $k$ on the last page of her grimoire. Prove that there exists a positive integer $N$ such that for all $n>N$, we have that \[n^{0.99n}\leqslant F(n)\leqslant n^{1.01n}.\]
Proposed by Rohan Goyal and Pranjal Srivastava
2 replies
Rijul saini
Wednesday at 6:56 PM
Rg230403
3 hours ago
"all of the stupid geo gets sent to tst 2/5" -allen wang
pikapika007   27
N 3 hours ago by HamstPan38825
Source: USA TST 2024/2
Let $ABC$ be a triangle with incenter $I$. Let segment $AI$ intersect the incircle of triangle $ABC$ at point $D$. Suppose that line $BD$ is perpendicular to line $AC$. Let $P$ be a point such that $\angle BPA = \angle PAI = 90^\circ$. Point $Q$ lies on segment $BD$ such that the circumcircle of triangle $ABQ$ is tangent to line $BI$. Point $X$ lies on line $PQ$ such that $\angle IAX = \angle XAC$. Prove that $\angle AXP = 45^\circ$.

Luke Robitaille
27 replies
pikapika007
Dec 11, 2023
HamstPan38825
3 hours ago
Interior point of ABC
Jackson0423   2
N 3 hours ago by Diamond-jumper76
Let D be an interior point of the acute triangle ABC with AB > AC so that ∠DAB = ∠CAD. The point E on the segment AC satisfies ∠ADE = ∠BCD, the point F on the segment AB satisfies ∠F DA = ∠DBC, and the point X on the line AC satisfies CX = BX. Let O1 and O2 be the circumcenters of the triangles ADC and EXD, respectively. Prove that the lines BC, EF, and O1O2 are concurrent
2 replies
Jackson0423
Yesterday at 2:17 PM
Diamond-jumper76
3 hours ago
Length Condition on Circumcenter Implies Tangency
ike.chen   43
N 3 hours ago by reni_wee
Source: ISL 2022/G4
Let $ABC$ be an acute-angled triangle with $AC > AB$, let $O$ be its circumcentre, and let $D$ be a point on the segment $BC$. The line through $D$ perpendicular to $BC$ intersects the lines $AO, AC,$ and $AB$ at $W, X,$ and $Y,$ respectively. The circumcircles of triangles $AXY$ and $ABC$ intersect again at $Z \ne A$.
Prove that if $W \ne D$ and $OW = OD,$ then $DZ$ is tangent to the circle $AXY.$
43 replies
ike.chen
Jul 9, 2023
reni_wee
3 hours ago
IMO ShortList 2008, Number Theory problem 2
April   41
N 3 hours ago by shendrew7
Source: IMO ShortList 2008, Number Theory problem 2, German TST 2, P2, 2009
Let $ a_1$, $ a_2$, $ \ldots$, $ a_n$ be distinct positive integers, $ n\ge 3$. Prove that there exist distinct indices $ i$ and $ j$ such that $ a_i + a_j$ does not divide any of the numbers $ 3a_1$, $ 3a_2$, $ \ldots$, $ 3a_n$.

Proposed by Mohsen Jamaali, Iran
41 replies
April
Jul 9, 2009
shendrew7
3 hours ago
AIME resources
senboy   3
N 4 hours ago by Evanlovemath
what are some good book books(apart from aops books) that would prepare me for AMC 10/12 and AIME prep. I am aiming for about 100 on the amc 10 and a 4-7 on the AIME
3 replies
senboy
Yesterday at 11:29 AM
Evanlovemath
4 hours ago
Discuss the Stanford Math Tournament Here
Aaronjudgeisgoat   302
N Apr 23, 2025 by BS2012
I believe discussion is allowed after yesterday at midnight, correct?
If so, I will put tentative answers on this thread.
By the way, does anyone know the answer to Geometry Problem 5? I was wondering if I got that one right
Also, if you put answers, please put it in a hide tag

Answers for the Algebra Subject Test
Estimated Algebra Cutoffs
Answers for the Geometry Subject Test
Estimated Geo Cutoffs
Answers for the Discrete Subject Test
Estimated Cutoffs for Discrete
Answers for the Team Round
Guts Answers
302 replies
Aaronjudgeisgoat
Apr 14, 2025
BS2012
Apr 23, 2025
Discuss the Stanford Math Tournament Here
G H J
G H BBookmark kLocked kLocked NReply
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Aaronjudgeisgoat
918 posts
#1 • 3 Y
Y by RainbowJessa, cubres, At777
I believe discussion is allowed after yesterday at midnight, correct?
If so, I will put tentative answers on this thread.
By the way, does anyone know the answer to Geometry Problem 5? I was wondering if I got that one right
Also, if you put answers, please put it in a hide tag

Answers for the Algebra Subject Test
Estimated Algebra Cutoffs
Answers for the Geometry Subject Test
Estimated Geo Cutoffs
Answers for the Discrete Subject Test
Estimated Cutoffs for Discrete
Answers for the Team Round
Guts Answers
This post has been edited 21 times. Last edited by Aaronjudgeisgoat, Apr 22, 2025, 11:32 AM
Z K Y
The post below has been deleted. Click to close.
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Alex-131
5406 posts
#2 • 2 Y
Y by RainbowJessa, cubres
Generational Fumble part 2: a silly each on algebra and geo.

iirc, the correct answer was 12/25 for geo p5 (based on what others got).
Z K Y
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Aaronjudgeisgoat
918 posts
#3 • 2 Y
Y by RainbowJessa, cubres
Alex-131 wrote:
Generational Fumble part 2: a silly each on algebra and geo.

iirc, the correct answer was 12/25 for geo p5 (based on what others got).

RIP :noo:

I GOT P5 RIGHT THEN YAY
what are the chances a 7 on geo makes top 10 for online :maybe:
Distribution for Algebra
Distribution for Geometry
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Inaaya
423 posts
#4 • 2 Y
Y by RainbowJessa, cubres
Bro we (i) sold general and power and guts but i think we did ok on team
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Danielzh
492 posts
#5 • 2 Y
Y by RainbowJessa, cubres
Answer to discrete p8? I got my ans but others got other ans...
This post has been edited 1 time. Last edited by Danielzh, Apr 14, 2025, 2:03 PM
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Andyluo
1015 posts
#6 • 3 Y
Y by RainbowJessa, Shadow6885, cubres
problem 1 on the team round was diabolical

took 3 JMO quals and 1 TST quals $15$ minutes to solve it.

"Solve the $24$ game using the integers $(8,8,3,3)$ exactly once"

answer
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megarnie
5610 posts
#7 • 2 Y
Y by RainbowJessa, cubres
11101 10000 on alg (sillied the factorization on p4)

11111 11000 on discrete

i also sillied team p12 by doing 37 + 41 = 80
This post has been edited 1 time. Last edited by megarnie, Apr 14, 2025, 2:09 PM
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sharknavy75
703 posts
#8 • 2 Y
Y by RainbowJessa, cubres
Andyluo wrote:
problem 1 on the team round was diabolical

took 3 JMO quals and 1 TST quals $15$ minutes to solve it.

"Solve the $24$ game using the integers $(8,8,3,3)$ exactly once"

answer

Somehow my teammate solved it in less than 30 seconds.
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MathPerson12321
3801 posts
#9 • 2 Y
Y by RainbowJessa, cubres
Andyluo wrote:
problem 1 on the team round was diabolical

took 3 JMO quals and 1 TST quals $15$ minutes to solve it.

"Solve the $24$ game using the integers $(8,8,3,3)$ exactly once"

answer

Bruh what i mean I grind all ten so took me like 30 seconds LOL
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megarnie
5610 posts
#10 • 2 Y
Y by RainbowJessa, cubres
a lot of people memorized it
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idk12345678
408 posts
#11 • 2 Y
Y by RainbowJessa, cubres
Andyluo wrote:
problem 1 on the team round was diabolical

took 3 JMO quals and 1 TST quals $15$ minutes to solve it.

"Solve the $24$ game using the integers $(8,8,3,3)$ exactly once"

answer

#1 is NOT supposed to be that hard
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Aaronjudgeisgoat
918 posts
#12 • 2 Y
Y by RainbowJessa, cubres
How many people got >= 8 on geo btw
i wanna know my chances for t10 lol
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Inaaya
423 posts
#13 • 2 Y
Y by RainbowJessa, cubres
Aaronjudgeisgoat wrote:
How many people got >= 8 on geo btw
i wanna know my chances for t10 lol

bro ur orz u probably got it
also top 10 out of like 1000 people is crazy
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MathPerson12321
3801 posts
#14 • 2 Y
Y by RainbowJessa, cubres
Aaronjudgeisgoat wrote:
How many people got >= 8 on geo btw
i wanna know my chances for t10 lol

idek how hard was geo
me skipping the subject tests due to arml practice:
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megarnie
5610 posts
#15 • 2 Y
Y by RainbowJessa, cubres
also does anyone know how close 143.41434 is to the discrete tiebreaker answer
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