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Top rated · Stats

EricQian

Open on Codeforces · Unique solved

Rating2208· Master

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
37
Unique solved
879
Submissions (all)
2,067
Years with activity
2020–2026

Solved by problem rating

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

  • Unrated96
  • 800–89967
  • 900–99920
  • 1000–109920
  • 1100–119921
  • 1200–129923
  • 1300–139935

Solved by topic

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

  • greedy293
  • math288
  • dp238
  • constructive algorithms202
  • data structures197
  • implementation160

Rating changes

2020

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2020

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-09-24 14:50Codeforces Round 1053 (Div. 1)581-482208
2025-08-07 17:35Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)219+902256
2025-03-23 08:05Codeforces Round 1012 (Div. 1)554-902166
2024-11-30 17:35Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)640-232256
2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
1400–1499
32
  • 1500–159930
  • 1600–169926
  • 1700–179941
  • 1800–189934
  • 1900–199945
  • 2000–209938
  • 2100–219935
  • 2200–229947
  • 2300–239945
  • 2400–249959
  • 2500–259943
  • 2600–269930
  • 2700–279932
  • 2800–289923
  • 2900–299913
  • 3000–309912
  • 3100–31995
  • 3200–32993
  • 3300–33991
  • 3400–34991
  • 3500–35992
  • brute force
    156
  • graphs120
  • dfs and similar119
  • sortings99
  • binary search96
  • trees96
  • bitmasks92
  • combinatorics82
  • number theory75
  • strings56
  • two pointers47
  • dsu44
  • divide and conquer39
  • shortest paths29
  • geometry24
  • hashing23
  • probabilities21
  • interactive21
  • games21
  • matrices18
  • flows18
  • graph matchings10
  • Other (9 tags)39
  • 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.

    2021

    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.

    2022

    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.

    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 22/day in 2020)

    2021

    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 18/day in 2021)

    2022

    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 47/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 2/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 27/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 13/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 24/day in 2026)

    556
    -12
    2279
    2022-11-20 17:05Pinely Round 1 (Div. 1 + Div. 2)403-152291
    2022-11-06 17:05CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!)262+332306
    2022-10-23 09:50Codeforces Round 829 (Div. 1)303+192273
    2022-09-30 17:05Codeforces Global Round 22734-522254
    2022-07-16 16:35Codeforces Round 808 (Div. 1)188+562306
    2022-04-19 16:35Codeforces Round 783 (Div. 1)210+702250
    2022-03-20 13:50Codeforces Round 778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round)320+612180