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spectaclehong

Open on Codeforces · Unique solved

Rating2179· 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
137
Unique solved
971
Submissions (all)
2,768
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.

  • Unrated184
  • 800–89976
  • 900–99942
  • 1000–109955
  • 1100–119934
  • 1200–129958
  • 1300–139964

Solved by topic

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

  • greedy302
  • implementation269
  • math268
  • brute force141
  • constructive algorithms134
  • dp124
  • sortings

Rating changes

2017

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2017

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2020-05-17 11:20Educational Codeforces Round 87 (Rated for Div. 2)58+942179
2020-05-16 13:35Codeforces Round 643 (Div. 2)483+32085
2020-05-12 15:05Codeforces Round 641 (Div. 1)846-432082
2020-04-26 16:35Educational Codeforces Round 86 (Rated for Div. 2)87+1152125
2020-04-15 17:05Codeforces Round 635 (Div. 1)
1400–1499
42
  • 1500–159946
  • 1600–169954
  • 1700–179968
  • 1800–189962
  • 1900–199952
  • 2000–209935
  • 2100–219933
  • 2200–229922
  • 2300–239918
  • 2400–249916
  • 2500–25995
  • 2600–26992
  • 2700–27991
  • 2900–29991
  • 3000–30991
  • 93
  • data structures91
  • binary search79
  • graphs72
  • dfs and similar70
  • strings69
  • number theory64
  • combinatorics48
  • trees42
  • two pointers34
  • bitmasks32
  • geometry25
  • dsu22
  • shortest paths15
  • divide and conquer13
  • interactive13
  • games11
  • probabilities10
  • flows9
  • matrices8
  • hashing8
  • ternary search6
  • Other (6 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.

    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
    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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 36/day in 2017)

    2018

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 34/day in 2018)

    2019

    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 44/day in 2019)

    2020

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 14/day in 2020)

    2021

    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 18/day in 2021)

    2022

    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 19/day in 2022)

    1321
    -96
    2010
    2020-04-12 16:05Codeforces Round 633 (Div. 1)695-162106
    2020-04-10 16:35Educational Codeforces Round 85 (Rated for Div. 2)82+1152122
    2020-04-08 16:35Codeforces Round 632 (Div. 2)1801-672007
    2020-03-31 16:05Codeforces Round 630 (Div. 2)215+672074
    2020-03-23 16:35Educational Codeforces Round 84 (Rated for Div. 2)1398-512007
    2020-03-19 17:05Codeforces Global Round 7636+502058
    2020-03-03 16:50Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!)1119-202008