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C21

Open on Codeforces · Unique solved

Rating2209· 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
62
Unique solved
952
Submissions (all)
1,964
Years with activity
2018–2026

Solved by problem rating

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

  • Unrated66
  • 800–899102
  • 900–99929
  • 1000–109949
  • 1100–119929
  • 1200–129939
  • 1300–139947

Solved by topic

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

  • greedy305
  • math279
  • implementation270
  • dp218
  • brute force142
  • dfs and similar140
  • graphs

Rating changes

2018

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2018

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2020-01-05 16:05Codeforces Round 612 (Div. 1)181+782209
2020-01-04 14:35Hello 2020646+82131
2019-12-21 13:05Codeforces Round 609 (Div. 1)367-322123
2019-12-17 17:35Codeforces Global Round 6303+502155
2019-12-05 16:35Codeforces Round 604 (Div. 1)171+106
1400–1499
59
  • 1500–159977
  • 1600–169958
  • 1700–179975
  • 1800–189967
  • 1900–199956
  • 2000–209945
  • 2100–219945
  • 2200–229947
  • 2300–239919
  • 2400–249922
  • 2500–25996
  • 2600–26997
  • 2700–27992
  • 2800–28992
  • 2900–29992
  • 3000–30992
  • 136
  • data structures125
  • constructive algorithms121
  • sortings110
  • binary search96
  • trees80
  • number theory68
  • strings57
  • combinatorics54
  • two pointers46
  • dsu46
  • bitmasks40
  • shortest paths31
  • divide and conquer19
  • hashing16
  • games15
  • probabilities13
  • interactive13
  • matrices8
  • geometry7
  • fft6
  • ternary search5
  • Other (9 tags)30
  • 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.

    2021

    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.

    2025

    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.

    2026

    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
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    Nov
    Dec

    LessMore (max 14/day in 2018)

    2019

    Download PNG

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

    Jan
    Feb
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    Apr
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    Jun
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    LessMore (max 29/day in 2019)

    2020

    Download PNG

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

    Jan
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    Jun
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    Aug
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    LessMore (max 14/day in 2020)

    2021

    Download PNG

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

    Jan
    Feb
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    May
    Jun
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    LessMore (max 7/day in 2021)

    2023

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
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    Sep
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    LessMore (max 1/day in 2023)

    2025

    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 12/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
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    Dec

    LessMore (max 16/day in 2026)

    2105
    2019-11-29 16:35Codeforces Round 603 (Div. 2)115+911999
    2019-11-27 15:50Educational Codeforces Round 77 (Rated for Div. 2)328+431908
    2019-11-19 16:35Codeforces Round 601 (Div. 1)686-901865
    2019-11-16 16:35Codeforces Round 600 (Div. 2)1698-1021955
    2019-11-06 17:05Codeforces Round 599 (Div. 1)462-152057
    2019-11-01 16:35Codeforces Round 597 (Div. 2)47+1302072
    2019-10-26 13:05Codeforces Round 596 (Div. 1, based on Technocup 2020 Elimination Round 2)498-421942