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DragonTang

Open on Codeforces · Unique solved

Rating2534· 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
19
Unique solved
1,771
Submissions (all)
4,816
Years with activity
2017–2026

Solved by problem rating

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

  • Unrated3
  • 800–89949
  • 900–99918
  • 1000–109918
  • 1100–119915
  • 1200–129926
  • 1300–139923

Solved by topic

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

  • dp563
  • math527
  • data structures507
  • greedy468
  • constructive algorithms364
  • graphs315
  • implementation

Rating changes

2017

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

Jan
Feb
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May

Submission volume

Download all years PNG

2017

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2022-02-23 12:10Codeforces Round 773 (Div. 1)72+902534
2021-03-10 14:05Codeforces Round 706 (Div. 1)76+1202444
2021-02-28 16:35Codeforces Global Round 13484-42324
2021-01-28 16:50Codeforces Round 698 (Div. 1)76+1512328
2021-01-05 16:35Codeforces Round 694 (Div. 1)393
1400–1499
24
  • 1500–159929
  • 1600–169939
  • 1700–179941
  • 1800–189938
  • 1900–199937
  • 2000–209941
  • 2100–219948
  • 2200–229949
  • 2300–2399132
  • 2400–2499189
  • 2500–2599157
  • 2600–2699134
  • 2700–2799143
  • 2800–289990
  • 2900–299990
  • 3000–309968
  • 3100–319961
  • 3200–329968
  • 3300–339963
  • 3400–349939
  • 3500–359939
  • 296
  • brute force289
  • trees276
  • dfs and similar249
  • binary search213
  • combinatorics202
  • bitmasks172
  • number theory166
  • sortings165
  • two pointers116
  • divide and conquer108
  • strings106
  • dsu100
  • interactive89
  • geometry78
  • probabilities77
  • shortest paths74
  • flows57
  • hashing55
  • games51
  • fft51
  • graph matchings44
  • Other (9 tags)134
  • Jun
    Jul
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    Sep
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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
    Mar
    Apr
    May
    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.

    2019

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

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

    2025

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

    Jan
    Feb
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    Jun
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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
    Mar
    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.

    May
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    LessMore (max 6/day in 2017)

    2018

    Download PNG

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

    Jan
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    LessMore (max 15/day in 2018)

    2019

    Download PNG

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

    Jan
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    LessMore (max 21/day in 2019)

    2020

    Download PNG

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

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    2021

    Download PNG

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

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    LessMore (max 47/day in 2021)

    2022

    Download PNG

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

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    LessMore (max 68/day in 2022)

    2023

    Download PNG

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

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    LessMore (max 37/day in 2023)

    2024

    Download PNG

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

    Jan
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    LessMore (max 11/day in 2024)

    2025

    Download PNG

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

    Jan
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    LessMore (max 1/day in 2025)

    2026

    Download PNG

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

    Jan
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    LessMore (max 2/day in 2026)

    +13
    2177
    2020-12-30 17:35Good Bye 2020106+2302164
    2019-06-30 16:45Educational Codeforces Round 67 (Rated for Div. 2)350+121934
    2018-12-30 17:15Good Bye 20182269-791922
    2018-12-23 15:35Codeforces Round 528 (Div. 1, based on Technocup 2019 Elimination Round 4)259+342001
    2018-10-14 12:05Codeforces Round 516 (Div. 1, by Moscow Team Olympiad)358-381967
    2018-08-03 16:45Educational Codeforces Round 48 (Rated for Div. 2)40+1452005
    2018-07-14 16:35Educational Codeforces Round 47 (Rated for Div. 2)137+1081860