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Top rated · Stats

jiufeng

Open on Codeforces · Unique solved

Rating2268· 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
46
Unique solved
614
Submissions (all)
1,394
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.

  • Unrated18
  • 800–89988
  • 900–99924
  • 1000–109925
  • 1100–119922
  • 1200–129921
  • 1300–139934

Solved by topic

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

  • greedy258
  • math245
  • constructive algorithms159
  • implementation144
  • dp136
  • brute force116
  • data structures

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
2023-11-25 17:20CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!)456-72268
2023-07-29 17:05Codeforces Round 889 (Div. 1)362-32275
2023-05-14 16:35Codeforces Round 873 (Div. 1)600-1102278
2022-08-16 16:35Codeforces Round 814 (Div. 1)270-202388
2021-10-30 16:35Codeforces Round 752 (Div. 1)135
1400–1499
29
  • 1500–159936
  • 1600–169925
  • 1700–179942
  • 1800–189950
  • 1900–199934
  • 2000–209929
  • 2100–219929
  • 2200–229926
  • 2300–239922
  • 2400–249925
  • 2500–259916
  • 2600–269911
  • 2700–27994
  • 2800–28992
  • 3000–30991
  • 3100–31991
  • 105
  • sortings87
  • binary search72
  • dfs and similar68
  • graphs68
  • strings56
  • bitmasks52
  • number theory48
  • two pointers47
  • combinatorics47
  • trees41
  • shortest paths20
  • dsu19
  • hashing17
  • geometry13
  • interactive12
  • divide and conquer10
  • games7
  • string suffix structures6
  • ternary search6
  • probabilities6
  • graph matchings5
  • Other (5 tags)15
  • 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.

    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
    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
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    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 24/day in 2019)

    2020

    Download PNG

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

    Jan
    Feb
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    Jun
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    LessMore (max 36/day in 2020)

    2021

    Download PNG

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

    Jan
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    Jun
    Jul
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    LessMore (max 24/day in 2021)

    2022

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 14/day in 2022)

    2023

    Download PNG

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

    Jan
    Feb
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    May
    Jun
    Jul
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    LessMore (max 22/day in 2023)

    2024

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 12/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
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    May
    Jun
    Jul
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    Sep
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    Dec

    LessMore (max 10/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
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    May
    Jun
    Jul
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    Dec

    LessMore (max 7/day in 2026)

    +80
    2408
    2021-08-29 17:05Deltix Round, Summer 2021 (open for everyone, rated, Div. 1 + Div. 2)590-432328
    2021-08-24 17:05Codeforces Round 740 (Div. 1, based on VK Cup 2021 - Final (Engine))198+302371
    2021-08-01 17:00Codeforces Round 736 (Div. 1)141+1052341
    2021-07-25 17:20Codeforces Global Round 15535-22236
    2021-07-22 17:05Harbour.Space Scholarship Contest 2021-2022 (open for everyone, rated, Div. 1 + Div. 2)258+612238
    2021-07-17 17:35Codeforces Round 733 (Div. 1 + Div. 2, based on VK Cup 2021 - Elimination (Engine))398+372177
    2021-06-25 17:50Codeforces Round 728 (Div. 1)723-1092140