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blackEarth

Open on Codeforces · Unique solved

Rating2523· 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
11
Unique solved
1,307
Submissions (all)
4,792
Years with activity
2015–2023

Solved by problem rating

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

  • Unrated585
  • 800–89936
  • 900–99920
  • 1000–109923
  • 1100–119929
  • 1200–129938
  • 1300–139928

Solved by topic

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

  • implementation210
  • math185
  • greedy148
  • dp143
  • data structures116
  • brute force109
  • constructive algorithms

Rating changes

2015

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2015

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2018-10-04 09:35Codeforces Round 513 by Barcelona Bootcamp (rated, Div. 1 + Div. 2)70+62523
2018-02-14 14:05Codeforces Round 462 (Div. 1)53+152517
2017-12-29 18:10Good Bye 2017182-402502
2017-06-17 16:35Codeforces Round 419 (Div. 1)27+962542
2016-08-24 18:35AIM Tech Round 3 (Div. 1)84
1400–1499
29
  • 1500–159942
  • 1600–169949
  • 1700–179944
  • 1800–189940
  • 1900–199939
  • 2000–209937
  • 2100–219932
  • 2200–229949
  • 2300–239935
  • 2400–249946
  • 2500–259918
  • 2600–269926
  • 2700–279913
  • 2800–289911
  • 2900–299911
  • 3000–309912
  • 3100–31996
  • 3200–32993
  • 3300–33994
  • 3400–34991
  • 3500–35991
  • 92
  • graphs74
  • binary search73
  • dfs and similar67
  • sortings67
  • number theory62
  • trees55
  • strings52
  • geometry50
  • combinatorics49
  • two pointers29
  • games24
  • bitmasks24
  • divide and conquer24
  • dsu23
  • probabilities21
  • shortest paths18
  • matrices14
  • hashing12
  • string suffix structures10
  • flows6
  • meet-in-the-middle6
  • Other (10 tags)31
  • 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.

    2016

    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.

    2017

    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.

    2018

    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.

    2019

    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.

    2020

    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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 25/day in 2015)

    2016

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    Dec

    LessMore (max 233/day in 2016)

    2017

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    LessMore (max 79/day in 2017)

    2018

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    Dec

    LessMore (max 25/day in 2018)

    2019

    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 21/day in 2019)

    2020

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    LessMore (max 5/day in 2020)

    2023

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 2/day in 2023)

    +16
    2446
    2016-05-07 18:05Codeforces Round 351 (VK Cup 2016 Round 3, Div. 1 Edition)26+772430
    2016-03-28 18:35VK Cup 2016 - Round 1 (Div.1 Edition)17+1522353
    2016-03-19 10:35IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2)19+2192201
    2016-03-18 18:35CROC 2016 - Elimination Round37+2541982
    2015-11-20 18:35Codeforces Round 332 (Div. 2)478+51728
    2015-06-18 18:30Codeforces Round 308 (Div. 2)143+17231723