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Top rated · Stats

xianboyu

Open on Codeforces · Unique solved

Rating2580· 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
16
Unique solved
793
Submissions (all)
1,640
Years with activity
2021–2025

Solved by problem rating

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

  • Unrated35
  • 800–89937
  • 900–9997
  • 1000–109913
  • 1100–119911
  • 1200–12998
  • 1300–139914

Solved by topic

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

  • dp263
  • greedy234
  • math232
  • data structures190
  • constructive algorithms176
  • trees123
  • implementation

Rating changes

2021

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

Jan
Feb
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May

Submission volume

Download all years PNG

2021

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)125+442580
2024-04-06 17:35Codeforces Global Round 25173+252536
2024-03-30 17:35CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)116+722511
2023-10-22 13:05Codeforces Round 905 (Div. 1)557-1412439
2023-10-08 11:35Codeforces Round 902 (Div. 1, based on COMPFEST 15 - Final Round)
1400–1499
15
  • 1500–159924
  • 1600–169920
  • 1700–179925
  • 1800–189934
  • 1900–199935
  • 2000–209936
  • 2100–219931
  • 2200–229935
  • 2300–239945
  • 2400–249952
  • 2500–259945
  • 2600–269939
  • 2700–279934
  • 2800–289943
  • 2900–299930
  • 3000–309937
  • 3100–319923
  • 3200–329925
  • 3300–339917
  • 3400–34998
  • 3500–359915
  • 112
  • brute force110
  • graphs104
  • combinatorics95
  • sortings95
  • bitmasks86
  • binary search85
  • dfs and similar84
  • number theory62
  • probabilities55
  • two pointers44
  • divide and conquer37
  • strings34
  • dsu30
  • games29
  • interactive28
  • shortest paths26
  • flows22
  • geometry18
  • matrices17
  • graph matchings16
  • hashing14
  • Other (7 tags)28
  • 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
    Jul
    Aug
    Sep
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    Nov
    Dec

    LessMore (max 15/day in 2021)

    2022

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
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    Dec

    LessMore (max 36/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 30/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 31/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 13/day in 2025)

    31
    +170
    2580
    2023-04-15 11:05Codeforces Round 866 (Div. 1)96+732410
    2023-03-09 12:35Codeforces Round 857 (Div. 1)221+172337
    2023-02-05 15:05Codeforces Round 850 (Div. 1, based on VK Cup 2022 - Final Round)96+1582320
    2023-01-15 15:05Codeforces Round 844 (Div. 1 + Div. 2, based on VK Cup 2022 - Elimination Round)396+432162
    2023-01-10 13:45Codeforces Round 843 (Div. 2)41+1262119
    2022-10-23 12:05Codeforces Round 830 (Div. 2)16+3061993
    2022-10-23 09:50Codeforces Round 829 (Div. 2)44+3601687