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Top rated · Stats

kennethsnow

Open on Codeforces · Unique solved

Rating2415· 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
90
Unique solved
1,328
Submissions (all)
2,667
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.

  • Unrated246
  • 800–89961
  • 900–99934
  • 1000–109943
  • 1100–119949
  • 1200–129962
  • 1300–139970

Solved by topic

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

  • implementation405
  • math245
  • greedy219
  • dp185
  • brute force176
  • data structures124
  • constructive algorithms

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
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2016-03-19 10:35IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2)91-142415
2015-06-24 18:40Codeforces Round 309 (Div. 1)69+122429
2015-06-06 15:30Looksery Cup 2015172-42417
2015-05-26 18:35Codeforces Round 305 (Div. 1)108-552421
2015-05-07 18:30Codeforces Round 302 (Div. 1)51
1400–1499
63
  • 1500–159984
  • 1600–169976
  • 1700–179968
  • 1800–189978
  • 1900–199991
  • 2000–209976
  • 2100–219954
  • 2200–229948
  • 2300–239944
  • 2400–249927
  • 2500–259924
  • 2600–269912
  • 2700–27999
  • 2800–28993
  • 2900–29993
  • 3000–30991
  • 3100–31991
  • 3200–32991
  • 120
  • *special109
  • sortings108
  • graphs90
  • binary search88
  • dfs and similar85
  • strings75
  • number theory60
  • combinatorics56
  • trees54
  • geometry53
  • dsu37
  • bitmasks33
  • games31
  • two pointers30
  • shortest paths27
  • probabilities20
  • hashing18
  • divide and conquer10
  • matrices10
  • graph matchings9
  • expression parsing9
  • Other (7 tags)21
  • 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
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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
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    May
    Jun
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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.

    2013

    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.

    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
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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
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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.

    2017

    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.

    2018

    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.

    2019

    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.

    2020

    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.

    2022

    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.

    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.

    2026

    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.

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    LessMore (max 4/day in 2010)

    2011

    Download PNG

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

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    LessMore (max 35/day in 2011)

    2012

    Download PNG

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

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    LessMore (max 44/day in 2012)

    2013

    Download PNG

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

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    LessMore (max 32/day in 2013)

    2014

    Download PNG

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

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    LessMore (max 31/day in 2014)

    2015

    Download PNG

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

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    LessMore (max 16/day in 2015)

    2016

    Download PNG

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

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    2017

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

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    2018

    Download PNG

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

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    2019

    Download PNG

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

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    LessMore (max 9/day in 2019)

    2020

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

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    LessMore (max 11/day in 2020)

    2022

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

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    LessMore (max 3/day in 2022)

    2023

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

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    LessMore (max 1/day in 2023)

    2024

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

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    LessMore (max 3/day in 2024)

    2026

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

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    +29
    2476
    2015-04-26 18:30Codeforces Round 30098+72447
    2015-04-04 19:05ZeptoLab Code Rush 201543+942440
    2015-03-17 18:45Codeforces Round 296 (Div. 1)126-412346
    2015-02-17 18:35Codeforces Round 292 (Div. 1)39+1092387
    2015-02-02 18:35Codeforces Round 290 (Div. 1)108+802278
    2014-12-30 17:30Good Bye 2014362-1082198
    2014-09-28 18:05Codeforces Round 27097+562306