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jiaosiyuan

Open on Codeforces · Unique solved

Rating2315· 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
17
Unique solved
530
Submissions (all)
1,499
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.

  • Unrated22
  • 800–89924
  • 900–9995
  • 1000–10993
  • 1100–119910
  • 1200–12999
  • 1300–13999

Solved by topic

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

  • data structures157
  • dp153
  • greedy148
  • math148
  • constructive algorithms113
  • graphs97
  • trees

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
2024-04-30 17:05Codeforces Round 942 (Div. 1)90+1782315
2024-04-27 16:35Codeforces Round 941 (Div. 1)456+332137
2023-04-15 11:05Codeforces Round 866 (Div. 1)303+432104
2023-04-09 17:00Codeforces Round 865 (Div. 1)337+552061
2023-04-08 16:05Codeforces Round 864 (Div. 2)534
1400–1499
11
  • 1500–15995
  • 1600–169910
  • 1700–179912
  • 1800–189915
  • 1900–199912
  • 2000–209910
  • 2100–21996
  • 2200–229914
  • 2300–239918
  • 2400–249918
  • 2500–259915
  • 2600–269932
  • 2700–279930
  • 2800–289927
  • 2900–299929
  • 3000–309939
  • 3100–319938
  • 3200–329929
  • 3300–339931
  • 3400–349920
  • 3500–359927
  • 91
  • dfs and similar65
  • brute force62
  • implementation59
  • combinatorics57
  • binary search55
  • sortings52
  • divide and conquer47
  • bitmasks46
  • number theory36
  • strings34
  • two pointers33
  • flows31
  • dsu29
  • probabilities18
  • interactive18
  • shortest paths18
  • graph matchings18
  • games17
  • geometry16
  • matrices13
  • fft13
  • Other (7 tags)35
  • Jun
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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.

    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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    Dec

    LessMore (max 21/day in 2021)

    2022

    Download PNG

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

    Jan
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    May
    Jun
    Jul
    Aug
    Sep
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    LessMore (max 61/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
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    Dec

    LessMore (max 48/day in 2023)

    2024

    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 31/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
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    Dec

    LessMore (max 6/day in 2025)

    -37
    2006
    2022-09-29 16:35Educational Codeforces Round 136 (Rated for Div. 2)120+582043
    2022-09-23 14:05Codeforces Round 822 (Div. 2)105+1031985
    2022-06-12 16:35Educational Codeforces Round 130 (Rated for Div. 2)540+91882
    2022-06-03 16:35Codeforces Round 796 (Div. 2)554-11873
    2022-05-31 16:35CodeCraft-22 and Codeforces Round 795 (Div. 2)846-211874
    2022-05-23 16:35Educational Codeforces Round 129 (Rated for Div. 2)64+1851895
    2022-04-22 16:35Educational Codeforces Round 127 (Rated for Div. 2)819+821710