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dannyboy20031204

Open on Codeforces · Unique solved

Rating2419· 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
115
Unique solved
1,979
Submissions (all)
4,457
Years with activity
2019–2026

Solved by problem rating

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

  • Unrated394
  • 800–899228
  • 900–99967
  • 1000–109967
  • 1100–119963
  • 1200–129975
  • 1300–139974

Solved by topic

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

  • greedy690
  • math583
  • implementation435
  • dp395
  • constructive algorithms383
  • brute force314
  • data structures

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
2024-10-27 17:35Codeforces Global Round 27164+662419
2024-10-20 11:05Codeforces Round 980 (Div. 1)174+592353
2024-09-27 16:05Codeforces Round 975 (Div. 1)352+72294
2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)236+842287
2024-07-18 16:35Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
1400–1499
77
  • 1500–1599100
  • 1600–169983
  • 1700–1799102
  • 1800–189987
  • 1900–199996
  • 2000–209989
  • 2100–219978
  • 2200–229979
  • 2300–239965
  • 2400–249989
  • 2500–259940
  • 2600–269916
  • 2700–27995
  • 2800–28993
  • 3000–30991
  • 3200–32991
  • 301
  • sortings228
  • binary search192
  • graphs161
  • dfs and similar159
  • strings139
  • number theory126
  • trees122
  • bitmasks120
  • two pointers119
  • combinatorics105
  • shortest paths52
  • dsu51
  • divide and conquer50
  • games34
  • geometry34
  • hashing29
  • interactive25
  • probabilities19
  • flows19
  • ternary search15
  • matrices15
  • Other (8 tags)52
  • 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.

    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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    Aug
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    Oct
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    Dec

    LessMore (max 10/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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    Aug
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    LessMore (max 33/day in 2020)

    2021

    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 40/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 43/day in 2022)

    2023

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
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    LessMore (max 36/day in 2023)

    2024

    Download PNG

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

    Jan
    Feb
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    May
    Jun
    Jul
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    LessMore (max 25/day in 2024)

    2025

    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 20/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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    Sep
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    Dec

    LessMore (max 9/day in 2026)

    629
    -8
    2203
    2024-05-25 17:35Codeforces Round 947 (Div. 1 + Div. 2)550-142211
    2024-04-27 16:35Codeforces Round 941 (Div. 1)389+222225
    2024-04-06 17:35Codeforces Global Round 25683-122203
    2024-03-30 17:35CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)769-312215
    2024-03-16 17:00Codeforces Round 934 (Div. 1)190+1032246
    2024-02-29 16:35Codeforces Round 930 (Div. 1)660-752143
    2024-02-17 17:35think-cell Round 1294+612218