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Top rated · Stats

He_Ren

Open on Codeforces · Unique solved

Rating2950· International 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
97
Unique solved
2,118
Submissions (all)
5,165
Years with activity
2019–2025

Solved by problem rating

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

  • Unrated195
  • 800–899168
  • 900–99965
  • 1000–109980
  • 1100–119958
  • 1200–129975
  • 1300–139986

Solved by topic

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

  • greedy734
  • math650
  • implementation506
  • dp477
  • data structures431
  • constructive algorithms429

Rating changes

2019

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2019

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2023-07-11 17:35Codeforces Round 884 (Div. 1 + Div. 2)34+162950
2023-06-18 16:35Codeforces Round 880 (Div. 1)15+1102934
2023-05-14 16:35Codeforces Round 873 (Div. 1)48+172824
2023-04-29 16:50Codeforces Round 869 (Div. 1)125-722807
2023-03-31 16:35CodeTON Round 4 (Div. 1 + Div. 2, Rated, Prizes!)
1400–1499
76
  • 1500–159996
  • 1600–169994
  • 1700–1799105
  • 1800–189990
  • 1900–199993
  • 2000–209993
  • 2100–219985
  • 2200–229996
  • 2300–239975
  • 2400–249992
  • 2500–259978
  • 2600–269960
  • 2700–279947
  • 2800–289948
  • 2900–299933
  • 3000–309929
  • 3100–319925
  • 3200–329917
  • 3300–339930
  • 3400–34999
  • 3500–359920
  • brute force
    368
  • sortings240
  • graphs237
  • binary search231
  • dfs and similar195
  • trees169
  • two pointers164
  • number theory154
  • combinatorics154
  • strings149
  • bitmasks140
  • dsu86
  • shortest paths72
  • divide and conquer67
  • geometry67
  • interactive48
  • hashing45
  • probabilities43
  • games39
  • flows36
  • graph matchings26
  • string suffix structures25
  • Other (10 tags)112
  • 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.

    2024

    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
    Jun
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    Aug
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    Dec

    LessMore (max 30/day in 2019)

    2020

    Download PNG

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

    Jan
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    Jun
    Jul
    Aug
    Sep
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    LessMore (max 30/day in 2020)

    2021

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
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    LessMore (max 55/day in 2021)

    2022

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
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    Sep
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    Dec

    LessMore (max 69/day in 2022)

    2023

    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 61/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 8/day in 2024)

    2025

    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 9/day in 2025)

    17
    +129
    2879
    2022-11-20 17:05Pinely Round 1 (Div. 1 + Div. 2)188-872750
    2022-11-06 17:05CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!)27+662837
    2022-10-29 11:55Codeforces Round 831 (Div. 1 + Div. 2)98-622771
    2022-10-23 09:50Codeforces Round 829 (Div. 1)213-1242833
    2022-10-15 16:50Codeforces Global Round 2352-12957
    2022-10-07 17:05Dytechlab Cup 202236+162958
    2022-09-30 17:05Codeforces Global Round 22102-782942