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hzl4456

Open on Codeforces · Unique solved

Rating2128· 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
37
Unique solved
396
Submissions (all)
981
Years with activity
2019–2026

Solved by problem rating

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

  • Unrated218
  • 800–89948
  • 900–9999
  • 1000–109912
  • 1100–11998
  • 1200–129911
  • 1300–13999

Solved by topic

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

  • greedy89
  • math74
  • constructive algorithms45
  • brute force43
  • implementation43
  • dp34
  • sortings

Rating changes

2019

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2019

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2023-09-18 16:50CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!)457+592128
2023-07-29 17:05Codeforces Round 889 (Div. 1)364+812069
2023-07-27 16:35Educational Codeforces Round 152 (Rated for Div. 2)814-411988
2022-09-23 14:05Codeforces Round 822 (Div. 2)82+1042029
2022-07-16 16:35Codeforces Round 808 (Div. 2)
1400–1499
12
  • 1500–15998
  • 1600–169910
  • 1700–17997
  • 1800–189913
  • 1900–19998
  • 2000–20998
  • 2100–21992
  • 2200–22995
  • 2300–23992
  • 2400–24993
  • 2500–25991
  • 2800–28991
  • 3100–31991
  • 33
  • data structures21
  • bitmasks20
  • binary search18
  • number theory17
  • strings15
  • combinatorics11
  • two pointers10
  • trees10
  • graphs10
  • dfs and similar9
  • dsu6
  • games5
  • hashing3
  • geometry3
  • flows3
  • matrices2
  • ternary search2
  • probabilities1
  • shortest paths1
  • divide and conquer1
  • 2-sat1
  • Other (4 tags)4
  • 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.

    2021

    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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    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
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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
    Mar
    Apr
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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.

    2025

    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.

    2026

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

    Jan
    Feb
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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.

    May
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    Dec

    LessMore (max 16/day in 2019)

    2021

    Download PNG

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

    Jan
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    LessMore (max 15/day in 2021)

    2022

    Download PNG

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

    Jan
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    May
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    LessMore (max 32/day in 2022)

    2023

    Download PNG

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

    Jan
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    LessMore (max 31/day in 2023)

    2025

    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 2025)

    2026

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
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    LessMore (max 4/day in 2026)

    104
    +112
    1925
    2022-07-15 15:50Codeforces Round 807 (Div. 2)1446-421813
    2022-06-25 16:50Codeforces Global Round 211347+91855
    2022-05-13 16:35Educational Codeforces Round 128 (Rated for Div. 2)193+1111846
    2022-04-30 16:35Codeforces Round 785 (Div. 2)1010+41735
    2022-03-20 13:50Codeforces Round 778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round)1287+331731
    2022-03-06 12:10Codeforces Round 775 (Div. 2, based on Moscow Open Olympiad in Informatics)491+541698
    2022-02-23 12:10Codeforces Round 773 (Div. 2)2649-771644