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Top rated · Stats

bdfs_then_CSDN

Open on Codeforces · Unique solved

Rating2303· International 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
48
Unique solved
567
Submissions (all)
1,385
Years with activity
2021–2026

Solved by problem rating

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

  • Unrated25
  • 800–89960
  • 900–9997
  • 1000–109917
  • 1100–119917
  • 1200–129911
  • 1300–139914

Solved by topic

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

  • greedy203
  • math190
  • dp169
  • constructive algorithms138
  • data structures115
  • implementation101

Rating changes

2021

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2021

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)332+42303
2026-04-13 16:35Codeforces Round 1093 (Div. 1)101+1122299
2026-03-21 16:35Codeforces Round 1087 (Div. 2)68+672187
2026-03-16 16:50Educational Codeforces Round 188 (Rated for Div. 2)32+1292120
2026-03-14 16:35Codeforces Round 1086 (Div. 2)
1400–1499
22
  • 1500–159910
  • 1600–169911
  • 1700–179920
  • 1800–189920
  • 1900–199913
  • 2000–209921
  • 2100–219935
  • 2200–229935
  • 2300–239928
  • 2400–249937
  • 2500–259920
  • 2600–269919
  • 2700–279917
  • 2800–289920
  • 2900–299923
  • 3000–309924
  • 3100–319911
  • 3200–329910
  • 3300–339911
  • 3400–34995
  • 3500–35994
  • brute force
    92
  • combinatorics73
  • binary search71
  • trees60
  • sortings59
  • graphs57
  • bitmasks55
  • number theory51
  • dfs and similar45
  • strings35
  • interactive33
  • divide and conquer31
  • two pointers31
  • probabilities25
  • dsu18
  • shortest paths17
  • games16
  • hashing14
  • flows13
  • string suffix structures11
  • geometry11
  • graph matchings9
  • 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.

    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
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 4/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
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    Dec

    LessMore (max 13/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 36/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 38/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 25/day in 2025)

    2026

    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 33/day in 2026)

    882
    -40
    1991
    2026-02-08 11:05Codeforces Round 1078 (Div. 2)87+952031
    2025-12-29 16:35Educational Codeforces Round 186 (Rated for Div. 2)202+891936
    2025-12-27 17:35Good Bye 2025889+951847
    2025-12-11 16:35Codeforces Round 1070 (Div. 2)455+891752
    2025-12-05 16:35Codeforces Round 1068 (Div. 2)5028-1061663
    2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)4726-1341769
    2025-10-10 16:50Codeforces Round 1057 (Div. 2)920-151903