Hello Codeforces!↵
↵
I am glad to invite you to participate in [contest:2245], which will start on [contest_time:2245]. You will be given **2 hours and 30 minutes** to solve **8** problems, where **one problem** will be split into subtasks. Also, there is **at least one** interactive problem, so you are recommended to read the [guide](https://codeforces.me/blog/entry/45307) to interactive problems if you have not encountered them before. ↵
↵
All problems are authored and prepared by myself.↵
↵
Note the [rule restricting the use of AI](https://codeforces.me/blog/entry/133941). If you are caught breaking this rule, you will be thrown into [user:SSerxhs,2026-07-09]'s basement. For your own well-being, I suggest adhering to the rules.↵
↵
I would like to thank the following people for helping make this round possible!↵
↵
- [user:SSerxhs,2026-07-09] for his/her satisfactory coordination.↵
- [user:Alexdat2000,2026-07-12] for translating the statements to Russian.↵
- [user:nifeshe,2026-07-12] for "I will solve this problem today" — [user:nifeshe,2026-07-08].↵
- [user:StarSilk,2026-07-09], [user:EvenImage,2026-07-09], [user:tiger2005,2026-07-09] for nutella testing.↵
- [user:zeemanz,2026-07-09], [user:0.1w33hw3,2026-07-09], [user:nifeshe,2026-07-09], [user:_istil,2026-07-09], [user:SATSKY_2025target_LGM,2026-07-09] for red testing.↵
- [user:Seele_H,2026-07-09], [user:Proof_by_QED,2026-07-09], [user:GUAIKATTO,2026-07-09], [user:CReatiQ,2026-07-09] for orange testing.↵
- [user:-WIDA-,2026-07-09], [user:Liang_SYEA,2026-07-09], [user:Argentum47,2026-07-09], [user:SpyrosAliv,2026-07-09], [user:wakanda-forever,2026-07-09] for purple testing.↵
- [user:fr200110217102,2026-07-09], [user:simplelife,2026-07-09], [user:XiaoXia,2026-07-09], [user:acmtoohard,2026-07-09], [user:big-mktx,2026-07-09] for blue testing.↵
- [user:yuki_Ishijo,2026-07-09] for cyan testing.↵
- [user:Whalica,2026-07-09] for green testing.↵
- [user:MikeMirzayanov,2026-07-09] and [user:KAN,2026-07-12] for the incredible Codeforces and Polygon platforms.↵
↵
Now a few words from our sponsor.↵
↵
<p>↵
<img style="float: right; margin: 0 1em 0.5em 1em; width: 400px;" ↵
src="/predownloaded/9b/5b/9b5bd2cb8efc932da2742d0fbb1ab589202373f4.png" ↵
alt="Spectral Technologies">↵
↵
🏁<b>The final round of Spectral::Cup 2026 is coming!</b>↵
↵
<p>This round is special to us. Not only will it conclude our three-round Spectral::Cup tournament, but it will also take place during our company’s birthday month — <a href="https://spectral.tech"><b>Spectral::Technologies</b></a> turned 7 this July 🎉 ↵
↵
Round 3 is the final part of our birthday celebration. The rest is in this video 😄↵
↵
<div style="margin: 2em 0; text-align: center;">↵
<iframe width="560" height="315" src="https://youtube.com/embed/cVYiKN44KL8"↵
title="YouTube video player" frameborder="0"↵
allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"↵
allowfullscreen>↵
</iframe>↵
</div>↵
↵
We are already sending out the merch from the two previous rounds — here is a little preview of what is on its way. A personal approach is important to us, so every prize is made especially for its recipient.↵
↵
<p>↵
<img style="float: left; margin: 0 1em 0.5em 1em; width: 400px;" ↵
src="/predownloaded/52/5a/525a4c580ee1dc9d213eb80b2a62fe4f7b2412f5.png" ↵
alt="merch">↵
↵
🏆<b>Prizes for Spectral::Cup Round 3</b>↵
↵
Top 30 participants in Round 3 will receive personalized hoodies.↵
↵
🏆<b>Final Prizes for Spectral::Cup 2026</b>↵
↵
The final round is also your last chance to improve your position in the overall standings. Your final score is the sum of your two best results across all three rounds, calculated using the <a href="/assets/gp500_points/gp500_points.html">GP500</a> scoring system.↵
↵
Among the participants who finish the Cup in the final Top 500, 30 randomly selected participants will receive a prize box.↵
↵
Top 15 by final cup score will receive a Claude subscription.↵
↵
Top 3 by final cup score will receive:↵
↵
- **1st place — MacBook Pro**↵
↵
- **2nd place — iPad Pro**↵
↵
- **3rd place — WHOOP**↵
↵
↵
_Top 3 winners can choose to receive the equivalent value in USDT instead._↵
↵
<p> ↵
Last but not least, if you would like to join Spectral Team check out our Quant roles:</b>↵
</p>↵
<ul>↵
<li><a href="http://assets.codeforces.com/spectraltech/junior/"><b>Junior Quant</b></a> – 150–180k USD + profit sharing</li>↵
<li><a href="https://assets.codeforces.com/spectraltech/middle/"><b>Middle Quant</b></a> – 240–320k USD + profit sharing</li>↵
<li><a href="https://assets.codeforces.com/spectraltech/senior/"><b>Senior Quant</b></a> – 360–500k USD + profit sharing</li>↵
</ul>↵
↵
<p>↵
We’re also hiring for C++, ML, and DevOps roles. Complete the application form to explore career opportunities with us.↵
</p>↵
<center style="margin: 2em;"> <a href="https://codeforces.me/userForm/5d5a5da8bc721bd9" style="text-decoration: none;font-size: 18.0px;background-color: rgb(153, 204, 255);color: rgb(0, 0, 0);font-weight: bold;padding: 0.5em 1.0em;">Apply</a> <span style="font-size: 30px;"></span>↵
</center>↵
↵
_PS We reserve the right to apply strict compliance checks when finalizing the results in order to prevent unfair participation and rule violations._↵
↵
**Good luck!**↵
↵
------------------
↵
I am glad to invite you to participate in [contest:2245], which will start on [contest_time:2245]. You will be given **2 hours and 30 minutes** to solve **8** problems, where **one problem** will be split into subtasks. Also, there is **at least one** interactive problem, so you are recommended to read the [guide](https://codeforces.me/blog/entry/45307) to interactive problems if you have not encountered them before. ↵
↵
All problems are authored and prepared by myself.↵
↵
Note the [rule restricting the use of AI](https://codeforces.me/blog/entry/133941). If you are caught breaking this rule, you will be thrown into [user:SSerxhs,2026-07-09]'s basement. For your own well-being, I suggest adhering to the rules.↵
↵
I would like to thank the following people for helping make this round possible!↵
↵
- [user:SSerxhs,2026-07-09] for his/her satisfactory coordination.↵
- [user:Alexdat2000,2026-07-12] for translating the statements to Russian.↵
- [user:nifeshe,2026-07-12] for "I will solve this problem today" — [user:nifeshe,2026-07-08].↵
- [user:StarSilk,2026-07-09], [user:EvenImage,2026-07-09], [user:tiger2005,2026-07-09] for nutella testing.↵
- [user:zeemanz,2026-07-09], [user:0.1w33hw3,2026-07-09], [user:nifeshe,2026-07-09], [user:_istil,2026-07-09], [user:SATSKY_2025target_LGM,2026-07-09] for red testing.↵
- [user:Seele_H,2026-07-09], [user:Proof_by_QED,2026-07-09], [user:GUAIKATTO,2026-07-09], [user:CReatiQ,2026-07-09] for orange testing.↵
- [user:-WIDA-,2026-07-09], [user:Liang_SYEA,2026-07-09], [user:Argentum47,2026-07-09], [user:SpyrosAliv,2026-07-09], [user:wakanda-forever,2026-07-09] for purple testing.↵
- [user:fr200110217102,2026-07-09], [user:simplelife,2026-07-09], [user:XiaoXia,2026-07-09], [user:acmtoohard,2026-07-09], [user:big-mktx,2026-07-09] for blue testing.↵
- [user:yuki_Ishijo,2026-07-09] for cyan testing.↵
- [user:Whalica,2026-07-09] for green testing.↵
- [user:MikeMirzayanov,2026-07-09] and [user:KAN,2026-07-12] for the incredible Codeforces and Polygon platforms.↵
↵
Now a few words from our sponsor.↵
↵
<p>↵
<img style="float: right; margin: 0 1em 0.5em 1em; width: 400px;" ↵
src="/predownloaded/9b/5b/9b5bd2cb8efc932da2742d0fbb1ab589202373f4.png" ↵
alt="Spectral Technologies">↵
↵
🏁<b>The final round of Spectral::Cup 2026 is coming!</b>↵
↵
<p>This round is special to us. Not only will it conclude our three-round Spectral::Cup tournament, but it will also take place during our company’s birthday month — <a href="https://spectral.tech"><b>Spectral::Technologies</b></a> turned 7 this July 🎉 ↵
↵
Round 3 is the final part of our birthday celebration. The rest is in this video 😄↵
↵
<div style="margin: 2em 0; text-align: center;">↵
<iframe width="560" height="315" src="https://youtube.com/embed/cVYiKN44KL8"↵
title="YouTube video player" frameborder="0"↵
allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"↵
allowfullscreen>↵
</iframe>↵
</div>↵
↵
We are already sending out the merch from the two previous rounds — here is a little preview of what is on its way. A personal approach is important to us, so every prize is made especially for its recipient.↵
↵
<p>↵
<img style="float: left; margin: 0 1em 0.5em 1em; width: 400px;" ↵
src="/predownloaded/52/5a/525a4c580ee1dc9d213eb80b2a62fe4f7b2412f5.png" ↵
alt="merch">↵
↵
🏆<b>Prizes for Spectral::Cup Round 3</b>↵
↵
Top 30 participants in Round 3 will receive personalized hoodies.↵
↵
🏆<b>Final Prizes for Spectral::Cup 2026</b>↵
↵
The final round is also your last chance to improve your position in the overall standings. Your final score is the sum of your two best results across all three rounds, calculated using the <a href="/assets/gp500_points/gp500_points.html">GP500</a> scoring system.↵
↵
Among the participants who finish the Cup in the final Top 500, 30 randomly selected participants will receive a prize box.↵
↵
Top 15 by final cup score will receive a Claude subscription.↵
↵
Top 3 by final cup score will receive:↵
↵
- **1st place — MacBook Pro**↵
↵
- **2nd place — iPad Pro**↵
↵
- **3rd place — WHOOP**↵
↵
↵
_Top 3 winners can choose to receive the equivalent value in USDT instead._↵
↵
<p> ↵
Last but not least, if you would like to join Spectral Team check out our Quant roles:</b>↵
</p>↵
<ul>↵
<li><a href="http://assets.codeforces.com/spectraltech/junior/"><b>Junior Quant</b></a> – 150–180k USD + profit sharing</li>↵
<li><a href="https://assets.codeforces.com/spectraltech/middle/"><b>Middle Quant</b></a> – 240–320k USD + profit sharing</li>↵
<li><a href="https://assets.codeforces.com/spectraltech/senior/"><b>Senior Quant</b></a> – 360–500k USD + profit sharing</li>↵
</ul>↵
↵
<p>↵
We’re also hiring for C++, ML, and DevOps roles. Complete the application form to explore career opportunities with us.↵
</p>↵
<center style="margin: 2em;"> <a href="https://codeforces.me/userForm/5d5a5da8bc721bd9" style="text-decoration: none;font-size: 18.0px;background-color: rgb(153, 204, 255);color: rgb(0, 0, 0);font-weight: bold;padding: 0.5em 1.0em;">Apply</a> <span style="font-size: 30px;"></span>↵
</center>↵
↵
_PS We reserve the right to apply strict compliance checks when finalizing the results in order to prevent unfair participation and rule violations._↵
↵
**Good luck!**↵
↵
------------------
