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Top rated · Stats

yaoyanfeng

Open on Codeforces · Unique solved

Rating2109· 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
15
Unique solved
471
Submissions (all)
1,801
Years with activity
2022–2026

Solved by problem rating

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

  • Unrated17
  • 800–89922
  • 900–9994
  • 1000–10998
  • 1100–11995
  • 1200–129910
  • 1300–139911

Solved by topic

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

  • math169
  • dp160
  • greedy143
  • data structures128
  • constructive algorithms102
  • graphs83
  • implementation

Rating changes

2022

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

2022

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-05-06 08:35Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)304-182109
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)187+1322127
2026-04-13 16:35Codeforces Round 1093 (Div. 1)492-131995
2025-12-27 17:35Good Bye 20255321-1752008
2025-09-24 14:50Codeforces Round 1053 (Div. 1)
1400–1499
7
  • 1500–15996
  • 1600–16998
  • 1700–179912
  • 1800–18999
  • 1900–199919
  • 2000–209916
  • 2100–219922
  • 2200–229915
  • 2300–239934
  • 2400–249930
  • 2500–259933
  • 2600–269931
  • 2700–279914
  • 2800–289924
  • 2900–299915
  • 3000–309925
  • 3100–319920
  • 3200–329924
  • 3300–33999
  • 3400–34997
  • 3500–359914
  • 83
  • brute force75
  • dfs and similar69
  • binary search67
  • trees63
  • combinatorics50
  • sortings47
  • bitmasks44
  • number theory44
  • probabilities38
  • interactive31
  • divide and conquer29
  • strings27
  • two pointers25
  • dsu24
  • flows17
  • shortest paths16
  • hashing16
  • games16
  • matrices9
  • geometry8
  • string suffix structures8
  • Other (8 tags)29
  • Jun
    Jul
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    Sep
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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.

    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
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    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.

    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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    Dec

    LessMore (max 28/day in 2022)

    2023

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 21/day in 2023)

    2024

    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 29/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 46/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 10/day in 2026)

    390
    +23
    2183
    2025-01-26 17:05Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2)1032-272160
    2024-11-15 14:35Codeforces Round 987 (Div. 2)49+922187
    2024-10-20 11:05Codeforces Round 980 (Div. 1)675-362095
    2024-10-06 08:05Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)105+672131
    2024-09-29 17:35Codeforces Round 976 (Div. 2) and Divide By Zero 9.012+3082064
    2024-06-16 11:05Codeforces Round 953 (Div. 2)57+3971756
    2024-05-31 12:05Codeforces Round 949 (Div. 2)1441+2131359