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Top rated · Stats

ahyeon

Open on Codeforces · Unique solved

Rating2445· 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
148
Unique solved
1,372
Submissions (all)
3,811
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.

  • Unrated180
  • 800–899259
  • 900–99941
  • 1000–109960
  • 1100–119963
  • 1200–129965
  • 1300–139981

Solved by topic

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

  • greedy542
  • math431
  • implementation359
  • constructive algorithms302
  • brute force249
  • data structures233

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
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)74+1102445
2026-04-13 16:35Codeforces Round 1093 (Div. 1)380-702335
2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)215-72405
2026-02-23 17:05Codeforces Round 1082 (Div. 1)243-232412
2026-02-11 17:35Codeforces Round 1079 (Div. 1)
1400–1499
76
  • 1500–159947
  • 1600–169954
  • 1700–179975
  • 1800–189947
  • 1900–199959
  • 2000–209950
  • 2100–219956
  • 2200–229938
  • 2300–239933
  • 2400–249929
  • 2500–259923
  • 2600–269917
  • 2700–27998
  • 2800–28995
  • 2900–29992
  • 3000–30991
  • 3100–31992
  • 3400–34991
  • dp
    210
  • sortings190
  • binary search159
  • dfs and similar125
  • graphs122
  • number theory114
  • strings107
  • two pointers95
  • bitmasks87
  • trees85
  • combinatorics66
  • dsu45
  • shortest paths43
  • games42
  • *special35
  • divide and conquer34
  • geometry30
  • hashing29
  • interactive28
  • probabilities14
  • ternary search8
  • string suffix structures7
  • Other (10 tags)32
  • 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.

    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
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    Aug
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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.

    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
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    Dec

    LessMore (max 1/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 63/day in 2022)

    2023

    Download PNG

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

    Jan
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    LessMore (max 42/day in 2023)

    2024

    Download PNG

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

    Jan
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    May
    Jun
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    LessMore (max 32/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
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    Dec

    LessMore (max 26/day in 2025)

    2026

    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 2026)

    71
    +115
    2435
    2026-01-29 17:35Codeforces Round 1077 (Div. 1)185+322320
    2026-01-17 17:35Codeforces Round 1073 (Div. 1)364-152288
    2025-07-19 16:50Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)524-32303
    2025-07-06 17:35EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2)306+202306
    2025-05-31 16:35Codeforces Round 1028 (Div. 1)759-1102286
    2025-05-11 17:05Codeforces Round 1024 (Div. 1)111+882396
    2025-04-19 16:35Neowise Labs Contest 1 (Codeforces Round 1018, Div. 1 + Div. 2)684-442308