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Ai_Haibara

Open on Codeforces · Unique solved

Rating2263· 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
23
Unique solved
612
Submissions (all)
1,092
Years with activity
2020–2026

Solved by problem rating

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

  • Unrated41
  • 800–89961
  • 900–99924
  • 1000–109925
  • 1100–119922
  • 1200–129923
  • 1300–139929

Solved by topic

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

  • greedy219
  • math191
  • constructive algorithms154
  • implementation141
  • dp138
  • data structures128

Rating changes

2020

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2020

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2022-06-25 16:50Codeforces Global Round 21150+1382263
2021-11-28 17:05Deltix Round, Autumn 2021 (open for everyone, rated, Div. 1 + Div. 2)273+1082125
2021-10-17 13:20Codeforces Round 749 (Div. 1 + Div. 2, based on Technocup 2022 Elimination Round 1)608+382017
2021-10-10 11:05Educational Codeforces Round 115 (Rated for Div. 2)927-771979
2020-09-24 16:35
1400–1499
24
  • 1500–159920
  • 1600–169930
  • 1700–179930
  • 1800–189928
  • 1900–199936
  • 2000–209920
  • 2100–219923
  • 2200–229922
  • 2300–239921
  • 2400–249923
  • 2500–259930
  • 2600–269911
  • 2700–27996
  • 2800–28999
  • 2900–29996
  • 3000–309917
  • 3100–31999
  • 3200–329912
  • 3300–33995
  • 3400–34993
  • 3500–35992
  • brute force
    107
  • sortings83
  • graphs68
  • binary search67
  • dfs and similar63
  • number theory61
  • strings55
  • trees55
  • bitmasks52
  • combinatorics43
  • two pointers34
  • dsu30
  • interactive23
  • divide and conquer22
  • shortest paths21
  • geometry18
  • games15
  • probabilities13
  • hashing12
  • fft10
  • 2-sat8
  • matrices6
  • Other (9 tags)30
  • 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
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    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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    LessMore (max 21/day in 2020)

    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
    Jun
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    LessMore (max 17/day in 2022)

    2023

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 21/day in 2023)

    2024

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 4/day in 2024)

    2026

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    Dec

    LessMore (max 1/day in 2026)

    Codeforces Round 672 (Div. 2)
    104
    +107
    2056
    2020-09-06 16:35Codeforces Round 668 (Div. 2)47+1551949
    2020-04-03 16:35Codeforces Round 631 (Div. 2) - Thanks, Denis aramis Shitov!383+991794
    2020-03-26 16:35Codeforces Round 629 (Div. 3)306+981695
    2020-03-19 17:05Codeforces Global Round 73169+141597
    2020-03-14 16:35Codeforces Round 628 (Div. 2)1347+761583
    2020-03-09 16:35Educational Codeforces Round 83 (Rated for Div. 2)3277-241507
    2020-03-07 11:35Codeforces Round 626 (Div. 2, based on Moscow Open Olympiad in Informatics)1444+141531