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Top rated · Stats

cuiaoxiang

Open on Codeforces · Unique solved

Rating2237· 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
94
Unique solved
6,275
Submissions (all)
12,627
Years with activity
2010–2026

Solved by problem rating

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

  • Unrated1,027
  • 800–899751
  • 900–999226
  • 1000–1099259
  • 1100–1199283
  • 1200–1299293
  • 1300–1399299

Solved by topic

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

  • greedy1,862
  • math1,859
  • implementation1,672
  • dp1,095
  • brute force1,037
  • constructive algorithms951

Rating changes

2010

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2010

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-03-16 17:00Codeforces Round 934 (Div. 1)178+1152237
2024-01-13 16:35Codeforces Round 919 (Div. 2)60+1022122
2023-12-30 16:50Good Bye 20234683-1532020
2023-11-25 17:20CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!)765-342173
2023-10-28 17:05Codeforces Round 906 (Div. 1)376
1400–1499277
  • 1500–1599314
  • 1600–1699324
  • 1700–1799296
  • 1800–1899258
  • 1900–1999291
  • 2000–2099253
  • 2100–2199212
  • 2200–2299191
  • 2300–2399157
  • 2400–2499177
  • 2500–2599131
  • 2600–269992
  • 2700–279964
  • 2800–289934
  • 2900–299928
  • 3000–309915
  • 3100–319912
  • 3200–32997
  • 3300–33992
  • 3400–34992
  • data structures
    853
  • sortings703
  • binary search595
  • strings489
  • number theory477
  • graphs451
  • dfs and similar447
  • combinatorics391
  • bitmasks350
  • two pointers337
  • trees331
  • dsu168
  • geometry156
  • divide and conquer126
  • shortest paths118
  • hashing112
  • probabilities101
  • games98
  • interactive76
  • *special64
  • flows56
  • matrices51
  • Other (9 tags)209
  • Jun
    Jul
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    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.

    2011

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    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.

    2012

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
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    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.

    2013

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

    Jan
    Feb
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    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.

    2014

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

    Jan
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    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.

    2015

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

    Jan
    Feb
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    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.

    2016

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

    Jan
    Feb
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    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.

    2017

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

    Jan
    Feb
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    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.

    2018

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

    Jan
    Feb
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    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.

    2019

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

    Jan
    Feb
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    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.

    2020

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

    Jan
    Feb
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    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
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    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
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    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
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    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
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    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
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    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
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    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.

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    LessMore (max 22/day in 2010)

    2011

    Download PNG

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

    Jan
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    LessMore (max 19/day in 2011)

    2012

    Download PNG

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

    Jan
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    LessMore (max 19/day in 2012)

    2013

    Download PNG

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

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    LessMore (max 18/day in 2013)

    2014

    Download PNG

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

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    LessMore (max 22/day in 2014)

    2015

    Download PNG

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

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    LessMore (max 12/day in 2015)

    2016

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

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    LessMore (max 19/day in 2016)

    2017

    Download PNG

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

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    LessMore (max 39/day in 2017)

    2018

    Download PNG

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

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    LessMore (max 22/day in 2018)

    2019

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

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    LessMore (max 36/day in 2019)

    2020

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

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    LessMore (max 67/day in 2020)

    2021

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

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    LessMore (max 61/day in 2021)

    2022

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

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    LessMore (max 48/day in 2022)

    2023

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

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    LessMore (max 41/day in 2023)

    2024

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

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    LessMore (max 34/day in 2024)

    2025

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

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    LessMore (max 25/day in 2025)

    2026

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

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    LessMore (max 16/day in 2026)

    +4
    2207
    2023-09-18 16:50CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!)884-432203
    2023-08-30 17:35Pinely Round 2 (Div. 1 + Div. 2)928-692246
    2023-05-08 14:05Codeforces Round 872 (Div. 1)267+22315
    2023-04-15 11:05Codeforces Round 866 (Div. 1)224+82313
    2023-03-12 16:35Nebius Welcome Round (Div. 1 + Div. 2)302+302305
    2023-02-27 17:35Codeforces Round 854 by cybercats (Div. 1 + Div. 2)526-432275
    2023-02-05 15:05Codeforces Round 850 (Div. 1, based on VK Cup 2022 - Final Round)182+752318