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Top rated · Stats

hirayuu_cf

Open on Codeforces · Unique solved

Rating2421· 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
9
Unique solved
266
Submissions (all)
595
Years with activity
2023–2026

Solved by problem rating

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

  • Unrated11
  • 800–89941
  • 900–9998
  • 1000–109912
  • 1100–119915
  • 1200–129916
  • 1300–139917

Solved by topic

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

  • greedy128
  • math116
  • constructive algorithms66
  • implementation66
  • brute force57
  • data structures52

Rating changes

2023

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2023

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-09-24 14:50Codeforces Round 1053 (Div. 1)149+602421
2025-04-26 11:35Codeforces Round 1021 (Div. 1)58+1612361
2024-10-20 11:05Codeforces Round 980 (Div. 1)323+442200
2024-09-27 16:05Codeforces Round 975 (Div. 1)385+1002156
2024-06-16 11:05Codeforces Round 953 (Div. 2)577
1400–1499
16
  • 1500–159910
  • 1600–169917
  • 1700–179920
  • 1800–189917
  • 1900–199911
  • 2000–209911
  • 2100–21997
  • 2200–22996
  • 2300–239911
  • 2400–24998
  • 2500–25992
  • 2600–26992
  • 2700–27993
  • 2800–28992
  • 2900–29991
  • 3000–30991
  • 3100–31991
  • dp
    52
  • sortings43
  • number theory28
  • graphs28
  • strings28
  • binary search27
  • two pointers20
  • bitmasks19
  • dfs and similar18
  • combinatorics16
  • trees14
  • geometry10
  • games9
  • dsu8
  • shortest paths8
  • probabilities7
  • interactive5
  • hashing5
  • matrices4
  • ternary search4
  • *special3
  • divide and conquer2
  • Other (6 tags)7
  • 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 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 14/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 22/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)

    +73
    2056
    2024-05-31 12:05Codeforces Round 949 (Div. 2)56+2531983
    2024-02-11 11:35Codeforces Round 924 (Div. 2)5+5531730
    2023-10-22 13:05Codeforces Round 905 (Div. 3)111+4571177
    2023-10-22 09:05Codeforces Round 904 (Div. 2)185+720720