Savyly18 of 20 hard Codeforces problems, accepted by Codeforces
Savyly's Deep Code mode was given 20 recent Codeforces problems rated 2000 to 2400, from Candidate Master to Grandmaster level. Codeforces' own judge accepted 18 of its answers, including all four rated 2400, with one try each and no edits.
Every problem and verdict
| Problem | Name | Rating | Codeforces verdict |
|---|---|---|---|
| 2267E | Clean Substrings | 2000 (Candidate Master) | Accepted: 30 tests |
| 2266F | MEX Replacement | 2000 (Candidate Master) | Accepted: 31 tests |
| 2262B | Culling Game | 2000 (Candidate Master) | Accepted: 27 tests |
| 2260E | Cyclic Balance | 2000 (Candidate Master) | Not accepted: Wrong answer on test 3 |
| 2257E | Busy Beaver | 2100 (Master) | Accepted: 32 tests |
| 2252E | Generational Triplets | 2100 (Master) | Accepted: 23 tests |
| 2238E | Cake Trial | 2100 (Master) | Accepted: 31 tests |
| 2237E | Permutation Commutation | 2100 (Master) | Accepted: 20 tests |
| 2266G | Modular Tree | 2200 (Master) | Accepted: 21 tests |
| 2264E1 | A Prime Flood (Easy Version) | 2200 (Master) | Accepted: 30 tests |
| 2259H | Treasure Map Destruction (Counting Version) | 2200 (Master) | Accepted: 24 tests |
| 2254G | Nightcrawler | 2200 (Master) | Accepted: 22 tests |
| 2267F2 | XOR Transformations (Hard Version) | 2300 (International Master) | Accepted: 69 tests |
| 2262C | Traveling the World | 2300 (International Master) | Accepted: 28 tests |
| 2255D | How Long Until Nothing Remains? | 2300 (International Master) | Accepted: 44 tests |
| 2268C | KiaKio and Energy Intervals | 2300 (International Master) | Not accepted: Time limit on test 47 |
| 2241G | Summmon | 2400 (Grandmaster) | Accepted: 49 tests |
| 2237F | Paint the Array | 2400 (Grandmaster) | Accepted: 63 tests |
| 2258E | DivMEX | 2400 (Grandmaster) | Accepted: 38 tests |
| 2266H | Deque Malfunction | 2400 (Grandmaster) | Accepted: 26 tests |
🪔 Diwali offer until 8 November 2026: Savyly is ₹99 for 1 hour, ₹199 for 3 hours, ₹499 for an unlimited week and ₹999 for 30 days.
By rating
- 2000 (Candidate Master): 3 of 4 accepted
- 2100 (Master): 4 of 4 accepted
- 2200 (Master): 4 of 4 accepted
- 2300 (International Master): 3 of 4 accepted
- 2400 (Grandmaster): 4 of 4 accepted
How the test was run
- Problems: four per rating from 2000 to 2400, taken from Codeforces rounds held from June to September 2026. Nothing was picked or dropped after seeing the results.
- Answers: written by Savyly's Deep Code mode from the problem statement alone.
- Judging: each answer was submitted once, exactly as written, and judged by Codeforces on its full hidden tests (October 2026).
- Missed: 2260E (wrong answer on test 3) and 2268C (time limit on test 47).
How fast it answers
Once it hears a question, Savyly starts answering in 1.6 seconds: the median for real users over the 30 days to 17 October 2026. The rest of the answer streams in as it's written, so you can start speaking while it finishes.
- Measured: on Savyly's servers, from the moment the question arrives to the first words sent back, for every answer real users got. Test and load-test devices are left out.
- Deep answers are left out: Deep thinks longer on purpose, for the hardest problems.
How the 1.6 seconds is measured: the median time from our server receiving a question to sending the first words back, for real users over the 30 days to 17 October 2026. Deep answers aren't included.
What it means for you
Deep Code is Savyly's mode for the hardest problems: it thinks longer before it answers. For everyday questions, coding rounds and live calls, every other mode answers in seconds. Every plan, including the free 15 minutes, can use Deep.
Savyly reads the problem from your screen with one key, so it works on any site: Codeforces, LeetCode, HackerRank, CodeChef or your college's test portal.
Questions
Can AI solve hard Codeforces problems?
Yes. In October 2026, Savyly's Deep Code mode solved 18 of 20 recent Codeforces problems rated 2000 to 2400, as judged by Codeforces itself, with one try each and no edits.
Which problems were used?
Four problems at each rating from 2000 to 2400, from Codeforces rounds held from June to September 2026. Every problem and verdict is listed on this page with a link to Codeforces.
How fast does Savyly answer?
Once it hears a question, Savyly starts answering in 1.6 seconds (the median for real users over the 30 days to 17 October 2026), and the rest streams in as it's written.
Does Savyly work on LeetCode and HackerRank?
Yes. Savyly reads the question from your screen, so it works with any coding site or editor on Windows and Mac.
Is Deep mode included in every plan?
Yes. Every plan includes a Deep allowance, the free trial too, and bigger plans include more.