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Top rated · Stats

darrenhp

Open on Codeforces · Unique solved

Rating2151· 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
86
Unique solved
1,784
Submissions (all)
4,089
Years with activity
2012–2026

Solved by problem rating

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

  • Unrated25
  • 800–899223
  • 900–99957
  • 1000–109971
  • 1100–119998
  • 1200–129991
  • 1300–1399126

Solved by topic

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

  • math845
  • greedy565
  • number theory531
  • implementation395
  • dp383
  • brute force376
  • constructive algorithms

Rating changes

2012

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2012

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)250+642151
2026-02-26 17:05Codeforces Round 1083 (Div. 2)274-42087
2026-02-25 16:35Educational Codeforces Round 187 (Rated for Div. 2)189+282091
2026-02-23 17:05Codeforces Round 1082 (Div. 1)737-872063
2026-02-11 17:35Codeforces Round 1079 (Div. 1)
1400–1499
108
  • 1500–1599127
  • 1600–1699133
  • 1700–1799133
  • 1800–1899135
  • 1900–1999117
  • 2000–2099103
  • 2100–219996
  • 2200–229944
  • 2300–239932
  • 2400–249933
  • 2500–259913
  • 2600–26997
  • 2700–27996
  • 2800–28991
  • 2900–29992
  • 3000–30991
  • 3200–32992
  • 338
  • combinatorics332
  • bitmasks270
  • data structures223
  • binary search192
  • strings172
  • sortings171
  • dfs and similar129
  • graphs111
  • two pointers105
  • trees88
  • hashing84
  • string suffix structures51
  • interactive44
  • games41
  • dsu40
  • probabilities36
  • geometry35
  • divide and conquer33
  • shortest paths30
  • *special18
  • matrices14
  • Other (10 tags)63
  • 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.

    2013

    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.

    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.

    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
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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.

    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
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    Aug
    Sep
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    Dec

    LessMore (max 22/day in 2012)

    2013

    Download PNG

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

    Jan
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    LessMore (max 28/day in 2013)

    2014

    Download PNG

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

    Jan
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    LessMore (max 10/day in 2014)

    2021

    Download PNG

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

    Jan
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    LessMore (max 20/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)

    2023

    Download PNG

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

    Jan
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    May
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    LessMore (max 4/day in 2023)

    2024

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 1/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
    Jul
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    LessMore (max 81/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
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    Dec

    LessMore (max 32/day in 2026)

    207
    +99
    2150
    2026-01-29 17:35Codeforces Round 1077 (Div. 1)345+452051
    2026-01-23 16:35Codeforces Round 1075 (Div. 2)938-522006
    2026-01-17 17:35Codeforces Round 1073 (Div. 1)711-572058
    2026-01-07 17:35Hello 2026621+322115
    2025-12-29 16:35Educational Codeforces Round 186 (Rated for Div. 2)14+2232083
    2025-12-27 17:35Good Bye 20252419-321860
    2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)1932-371892