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Top rated · Stats

ericxiao

Open on Codeforces · Unique solved

Rating2212· 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
19
Unique solved
553
Submissions (all)
1,473
Years with activity
2018–2022

Solved by problem rating

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

  • Unrated151
  • 800–89958
  • 900–99915
  • 1000–109939
  • 1100–119916
  • 1200–129924
  • 1300–139927

Solved by topic

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

  • implementation152
  • greedy122
  • math121
  • brute force73
  • constructive algorithms68
  • dp62
  • sortings

Rating changes

2018

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

Jan
Feb
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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
2021-10-17 13:20Codeforces Round 749 (Div. 1 + Div. 2, based on Technocup 2022 Elimination Round 1)306+502212
2021-05-30 16:50Deltix Round, Spring 2021 (open for everyone, rated, Div. 1 + Div. 2)2235-1492162
2021-03-10 14:05Codeforces Round 706 (Div. 1)179+802311
2021-02-15 16:35Educational Codeforces Round 104 (Rated for Div. 2)11+1782231
2021-02-12 16:50
1400–1499
29
  • 1500–159922
  • 1600–169928
  • 1700–179920
  • 1800–189924
  • 1900–199921
  • 2000–209913
  • 2100–21999
  • 2200–229910
  • 2300–239910
  • 2400–249911
  • 2500–25996
  • 2600–26996
  • 2700–279910
  • 2800–28991
  • 2900–29991
  • 3000–30992
  • 56
  • data structures51
  • binary search41
  • strings40
  • graphs37
  • number theory33
  • dfs and similar31
  • *special29
  • trees21
  • two pointers21
  • combinatorics17
  • bitmasks16
  • geometry15
  • dsu10
  • probabilities9
  • divide and conquer6
  • string suffix structures5
  • hashing5
  • games4
  • ternary search4
  • interactive3
  • shortest paths3
  • Other (6 tags)7
  • 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.

    2019

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

    Jan
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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.

    2020

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

    Jan
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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.

    2021

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

    Jan
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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
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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.

    May
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    LessMore (max 12/day in 2018)

    2019

    Download PNG

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

    Jan
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    LessMore (max 21/day in 2019)

    2020

    Download PNG

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

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    LessMore (max 31/day in 2020)

    2021

    Download PNG

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

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    LessMore (max 46/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 28/day in 2022)

    Codeforces Round 701 (Div. 2)
    383
    +10
    2053
    2020-11-01 13:05Codeforces Round 680 (Div. 2, based on Moscow Team Olympiad)15+1702043
    2020-08-21 16:35Codeforces Round 665 (Div. 2)381+851873
    2020-01-04 14:35Hello 20201144+641788
    2019-10-13 11:05Codeforces Round 592 (Div. 2)1633-431724
    2019-08-11 14:35Codeforces Round 578 (Div. 2)2402-741767
    2019-06-16 11:35Codeforces Round 567 (Div. 2)74+1771841
    2019-06-07 14:05Codeforces Round 564 (Div. 2)1049-111664