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kokokostya

Open on Codeforces · Unique solved

Rating2598· 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
57
Unique solved
863
Submissions (all)
2,728
Years with activity
2015–2024

Solved by problem rating

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

  • Unrated553
  • 800–89915
  • 900–99912
  • 1000–109912
  • 1100–119913
  • 1200–129917
  • 1300–139918

Solved by topic

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

  • implementation110
  • greedy87
  • math78
  • constructive algorithms61
  • dp49
  • brute force46
  • data structures

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
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-06-09 17:35Codeforces Global Round 2691+642598
2020-11-15 17:05Codeforces Round 683 (Div. 1, by Meet IT)58+962534
2019-08-25 16:40Manthan, Codefest 19 (open for everyone, rated, Div. 1 + Div. 2)251-372438
2019-04-20 20:35Forethought Future Cup - Elimination Round182-622475
2019-04-06 13:35Codeforces Global Round 2
1400–1499
15
  • 1500–159919
  • 1600–169932
  • 1700–179929
  • 1800–189922
  • 1900–199919
  • 2000–209913
  • 2100–219918
  • 2200–229914
  • 2300–239910
  • 2400–249911
  • 2500–25995
  • 2600–26997
  • 2700–27994
  • 2800–28994
  • 2900–29991
  • 46
  • graphs42
  • binary search40
  • sortings37
  • dfs and similar34
  • strings32
  • trees24
  • *special23
  • number theory18
  • combinatorics16
  • two pointers14
  • geometry13
  • hashing10
  • games10
  • dsu10
  • shortest paths9
  • probabilities7
  • interactive7
  • bitmasks6
  • flows5
  • graph matchings4
  • string suffix structures3
  • Other (7 tags)13
  • 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
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    Apr
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    Jun
    Jul
    Aug
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    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.

    2017

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

    Jan
    Feb
    Mar
    Apr
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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
    Mar
    Apr
    May
    Jun
    Jul
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    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.

    2022

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
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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
    Feb
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    Apr
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    Jun
    Jul
    Aug
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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.

    2024

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

    Jan
    Feb
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    Apr
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    Jun
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    Aug
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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.

    May
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    LessMore (max 10/day in 2015)

    2016

    Download PNG

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

    Jan
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    LessMore (max 64/day in 2016)

    2017

    Download PNG

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

    Jan
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    LessMore (max 33/day in 2017)

    2018

    Download PNG

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

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    LessMore (max 59/day in 2018)

    2019

    Download PNG

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

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    2020

    Download PNG

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

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    LessMore (max 34/day in 2020)

    2021

    Download PNG

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

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    LessMore (max 39/day in 2021)

    2022

    Download PNG

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

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    LessMore (max 49/day in 2022)

    2023

    Download PNG

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

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    LessMore (max 42/day in 2023)

    2024

    Download PNG

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

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    LessMore (max 26/day in 2024)

    65
    +48
    2537
    2018-08-12 10:40VK Cup 2018 - Final19-1112489
    2018-04-29 15:45VK Cup 2018 - Round 36+852600
    2018-03-24 17:50VK Cup 2018 - Round 26+1222515
    2018-03-10 17:35VK Cup 2018 - Round 121+792393
    2018-03-04 17:35Codeforces Round 468 (Div. 1, based on Technocup 2018 Final Round)60+662314
    2018-02-25 18:05Codeforces Round 467 (Div. 1)170-292248
    2018-02-15 16:35ICM Technex 2018 and Codeforces Round 463 (Div. 1 + Div. 2, combined)180+42277