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Top rated · Stats

Qingyu

Open on Codeforces · Unique solved

Rating3065· Legendary 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
26
Unique solved
692
Submissions (all)
6,511
Years with activity
2018–2025

Solved by problem rating

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

  • Unrated78
  • 800–89980
  • 900–99915
  • 1000–109929
  • 1100–119925
  • 1200–129931
  • 1300–1399

Solved by topic

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

  • math235
  • greedy219
  • dp164
  • constructive algorithms136
  • implementation130
  • brute force115
  • data structures

Rating changes

2018

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

2018

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2023-09-30 17:35Codeforces Round 901 (Div. 1)4+1893065
2023-06-24 17:05CodeTON Round 5 (Div. 1 + Div. 2, Rated, Prizes!)30+652876
2023-03-31 16:35CodeTON Round 4 (Div. 1 + Div. 2, Rated, Prizes!)18+1462811
2023-03-12 16:35Nebius Welcome Round (Div. 1 + Div. 2)197-462665
2022-12-17 17:05Polynomial Round 2022 (Div. 1 + Div. 2, Rated, Prizes!)
21
  • 1400–149923
  • 1500–159921
  • 1600–169924
  • 1700–179928
  • 1800–189915
  • 1900–199914
  • 2000–209932
  • 2100–219925
  • 2200–229938
  • 2300–239928
  • 2400–249931
  • 2500–259927
  • 2600–269925
  • 2700–279917
  • 2800–289913
  • 2900–299912
  • 3000–30999
  • 3100–31998
  • 3200–32997
  • 3300–33994
  • 3400–34995
  • 3500–35997
  • 105
  • graphs75
  • binary search67
  • sortings65
  • number theory56
  • dfs and similar49
  • combinatorics48
  • trees46
  • two pointers43
  • strings41
  • bitmasks40
  • dsu28
  • shortest paths22
  • probabilities22
  • divide and conquer21
  • geometry21
  • games18
  • interactive14
  • flows14
  • hashing10
  • matrices8
  • fft8
  • Other (9 tags)32
  • 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.

    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.

    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.

    May
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    Dec

    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 16/day in 2019)

    2020

    Download PNG

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

    Jan
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    LessMore (max 23/day in 2020)

    2021

    Download PNG

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

    Jan
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    LessMore (max 20/day in 2021)

    2022

    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 1716/day in 2022)

    2023

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 24/day in 2023)

    2025

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    Dec

    LessMore (max 1/day in 2025)

    12
    +191
    2711
    2022-10-07 17:05Dytechlab Cup 2022133+362520
    2022-07-31 16:35CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!)26+2172484
    2022-01-03 16:50Hello 2022360+392267
    2021-12-29 17:35Good Bye 2021: 2022 is NEAR717-212228
    2021-11-28 17:05Deltix Round, Autumn 2021 (open for everyone, rated, Div. 1 + Div. 2)150+1302249
    2021-02-12 16:50Codeforces Round 701 (Div. 2)52+1352119
    2020-07-21 16:35Codeforces Round 658 (Div. 1)605+541984