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hanyuwei

Open on Codeforces · Unique solved

Rating2319· International 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
31
Unique solved
318
Submissions (all)
978
Years with activity
2017–2022

Solved by problem rating

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

  • Unrated14
  • 800–89921
  • 900–9996
  • 1000–10994
  • 1100–11993
  • 1200–12997
  • 1300–139910

Solved by topic

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

  • math106
  • greedy85
  • dp72
  • data structures71
  • constructive algorithms62
  • implementation58
  • graphs

Rating changes

2017

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

Jan
Feb
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Apr
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
2021-07-11 16:35Codeforces Round 732 (Div. 1)483-582319
2021-03-21 15:35Codeforces Round 709 (Div. 1, based on Technocup 2021 Final Round)70+1422377
2021-03-13 11:35Codeforces Round 707 (Div. 1, based on Moscow Open Olympiad in Informatics)298-12235
2021-03-10 14:05Codeforces Round 706 (Div. 1)453-72236
2020-12-30 17:35Good Bye 2020
1400–1499
11
  • 1500–159915
  • 1600–169915
  • 1700–179913
  • 1800–189913
  • 1900–199912
  • 2000–209911
  • 2100–21998
  • 2200–22996
  • 2300–23999
  • 2400–24999
  • 2500–25996
  • 2600–269922
  • 2700–279915
  • 2800–289917
  • 2900–299917
  • 3000–309927
  • 3100–319914
  • 3200–32998
  • 3300–33994
  • 3400–34991
  • 46
  • brute force34
  • sortings32
  • trees32
  • dfs and similar29
  • binary search28
  • combinatorics26
  • number theory26
  • strings18
  • bitmasks17
  • divide and conquer17
  • dsu14
  • shortest paths14
  • two pointers14
  • matrices12
  • probabilities10
  • hashing9
  • geometry9
  • games8
  • flows7
  • interactive5
  • graph matchings5
  • Other (8 tags)23
  • Jun
    Jul
    Aug
    Sep
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    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.

    2018

    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.

    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
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    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.

    May
    Jun
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    Nov
    Dec

    LessMore (max 9/day in 2017)

    2018

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
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    LessMore (max 13/day in 2018)

    2019

    Download PNG

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

    Jan
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    May
    Jun
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    LessMore (max 17/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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    LessMore (max 26/day in 2020)

    2021

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    LessMore (max 42/day in 2021)

    2022

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
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    LessMore (max 5/day in 2022)

    846
    -28
    2243
    2020-12-19 11:35Codeforces Round 691 (Div. 1)269+32271
    2020-11-29 09:05Codeforces Round 687 (Div. 1, based on Technocup 2021 Elimination Round 2)103+1332268
    2020-11-01 13:05Codeforces Round 680 (Div. 1, based on Moscow Team Olympiad)762-862135
    2020-05-12 15:05Codeforces Round 641 (Div. 1)572-272221
    2020-04-12 16:05Codeforces Round 633 (Div. 1)571-362248
    2020-04-03 16:35Codeforces Round 631 (Div. 1) - Thanks, Denis aramis Shitov!383+42284
    2020-03-07 11:35Codeforces Round 626 (Div. 1, based on Moscow Open Olympiad in Informatics)166+552280