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Error_Yuan

Open on Codeforces · Unique solved

Rating2526· Grandmaster

Bar charts count unique accepted problems (merged with the global problem set for rating and tags). Heatmaps use UTC calendar days. Rating squares are sums of newRating − oldRating from user.rating when System update time falls on that day. Submissions count every row from user.status (all verdicts), paginated until Codeforces has no more rows—heavy accounts can take a few seconds.

Rated contests
72
Unique solved
922
Submissions (all)
1,752
Years with activity
2022–2026

Solved by problem rating

Unique accepted problems, bucketed by catalog rating (100‑point bands). Unrated = no rating in the problem set.

  • Unrated37
  • 800–899213
  • 900–99940
  • 1000–109941
  • 1100–119955
  • 1200–129948
  • 1300–139942

Solved by topic

Each problem counts once per tag (same as Codeforces tags). Top tags shown; remaining mass in “Other”.

  • greedy441
  • math390
  • constructive algorithms281
  • implementation226
  • brute force214
  • dp196
  • sortings

Rating changes

2022

Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2022

Download PNG

Count of submissions per UTC day (includes every verdict).

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-01-26 17:05Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2)162+522526
2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)44+1902474
2024-10-27 17:35Codeforces Global Round 27283+542284
2024-10-20 11:05Codeforces Round 980 (Div. 1)556-432230
2024-09-27 16:05Codeforces Round 975 (Div. 1)
1400–1499
57
  • 1500–159939
  • 1600–169933
  • 1700–179950
  • 1800–189937
  • 1900–199946
  • 2000–209930
  • 2100–219932
  • 2200–229927
  • 2300–239930
  • 2400–249920
  • 2500–259917
  • 2600–26999
  • 2700–27997
  • 2800–28995
  • 2900–29993
  • 3000–30991
  • 3300–33991
  • 3500–35992
  • 155
  • data structures141
  • binary search111
  • number theory95
  • combinatorics79
  • strings74
  • two pointers73
  • dfs and similar72
  • bitmasks66
  • graphs66
  • trees65
  • games45
  • geometry23
  • divide and conquer22
  • dsu21
  • hashing20
  • shortest paths19
  • interactive15
  • matrices10
  • probabilities10
  • *special5
  • graph matchings5
  • Other (8 tags)24
  • Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2023

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2024

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2025

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2026

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 32/day in 2022)

    2023

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 33/day in 2023)

    2024

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 46/day in 2024)

    2025

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 15/day in 2025)

    2026

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 7/day in 2026)

    450
    -18
    2273
    2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)256+732291
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)866-392218
    2024-07-18 16:35Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)590-192257
    2024-06-30 17:35EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2)440-22276
    2024-06-09 17:35Codeforces Global Round 26392+232278
    2024-02-17 17:35think-cell Round 1615-312255
    2024-01-27 16:45Codeforces Round 921 (Div. 1)332+12286