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hld67890

Open on Codeforces · Unique solved

Rating2459· 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
51
Unique solved
737
Submissions (all)
1,836
Years with activity
2013–2023

Solved by problem rating

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

  • Unrated290
  • 800–89932
  • 900–99912
  • 1000–109916
  • 1100–119915
  • 1200–129922
  • 1300–139921

Solved by topic

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

  • implementation141
  • math133
  • greedy121
  • constructive algorithms105
  • dp91
  • data structures71
  • brute force

Rating changes

2013

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2013

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2022-11-06 17:05CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!)312-352459
2021-04-23 17:20Contest 2050 and Codeforces Round 718 (Div. 1 + Div. 2)142+522494
2020-03-03 16:50Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!)164+372442
2019-08-25 16:40Manthan, Codefest 19 (open for everyone, rated, Div. 1 + Div. 2)118+402405
2019-08-18 15:55
1400–1499
22
  • 1500–159928
  • 1600–169931
  • 1700–179928
  • 1800–189927
  • 1900–199930
  • 2000–209919
  • 2100–219919
  • 2200–229919
  • 2300–239913
  • 2400–249923
  • 2500–259914
  • 2600–269915
  • 2700–279910
  • 2800–289910
  • 2900–29996
  • 3000–30994
  • 3100–31993
  • 3200–32994
  • 3300–33991
  • 3400–34991
  • 3500–35992
  • 69
  • graphs56
  • binary search55
  • dfs and similar51
  • trees47
  • sortings43
  • number theory40
  • strings38
  • combinatorics25
  • bitmasks23
  • dsu20
  • two pointers15
  • geometry15
  • shortest paths14
  • interactive14
  • hashing12
  • games9
  • flows9
  • matrices9
  • probabilities8
  • divide and conquer8
  • ternary search7
  • Other (7 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.

    2014

    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.

    2015

    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.

    2016

    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.

    2017

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    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.

    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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 10/day in 2013)

    2014

    Download PNG

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

    Jan
    Feb
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    Jun
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    Dec

    LessMore (max 2/day in 2014)

    2015

    Download PNG

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

    Jan
    Feb
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    Jun
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    LessMore (max 10/day in 2015)

    2016

    Download PNG

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

    Jan
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    LessMore (max 13/day in 2016)

    2017

    Download PNG

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

    Jan
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    LessMore (max 15/day in 2017)

    2018

    Download PNG

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

    Jan
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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 42/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 39/day in 2020)

    2021

    Download PNG

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

    Jan
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    LessMore (max 36/day in 2021)

    2022

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 27/day in 2022)

    2023

    Download PNG

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

    Jan
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    LessMore (max 14/day in 2023)

    Codeforces Round 580 (Div. 1)
    86
    +65
    2365
    2019-06-01 16:50Codeforces Global Round 386+1132300
    2019-04-13 16:05Codeforces Round 551 (Div. 2)25+1132187
    2019-04-06 13:35Codeforces Global Round 2892-522074
    2018-12-16 17:05Avito Cool Challenge 2018550-612126
    2018-08-19 15:50Codeforces Round 505 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final)309+32187
    2018-08-17 16:50Codeforces Round 504 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final)135+762184
    2018-08-11 15:35Codeforces Round 503 (by SIS, Div. 1)244+22108