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Koosa

Open on Codeforces · Unique solved

Rating2213· 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
16
Unique solved
208
Submissions (all)
468
Years with activity
2024–2025

Solved by problem rating

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

  • Unrated41
  • 800–89934
  • 900–9996
  • 1000–10999
  • 1100–119911
  • 1200–129910
  • 1300–13999

Solved by topic

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

  • greedy87
  • math61
  • implementation54
  • brute force38
  • constructive algorithms37
  • data structures35

Rating changes

2024

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2024

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-08-25 16:35Codeforces Round 968 (Div. 2)27+1292213
2024-08-20 16:35Codeforces Round 967 (Div. 2)277+212084
2024-08-15 16:35Educational Codeforces Round 169 (Rated for Div. 2)928-502063
2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)1122-332113
2024-08-10 16:35Codeforces Round 965 (Div. 2)
1400–1499
7
  • 1500–15999
  • 1600–16997
  • 1700–179919
  • 1800–18997
  • 1900–199917
  • 2000–20995
  • 2100–21998
  • 2200–22996
  • 2300–23991
  • 2400–24991
  • 2500–25991
  • binary search
    27
  • sortings26
  • dp25
  • dfs and similar19
  • graphs18
  • strings17
  • number theory16
  • two pointers13
  • trees13
  • games9
  • combinatorics8
  • divide and conquer7
  • dsu6
  • bitmasks6
  • hashing5
  • interactive4
  • geometry3
  • shortest paths3
  • string suffix structures2
  • flows1
  • ternary search1
  • 2-sat1
  • Other (1 tag)1
  • 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
    Oct
    Nov
    Dec

    LessMore (max 41/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 8/day in 2025)

    9
    +244
    2146
    2024-08-04 16:35Codeforces Round 963 (Div. 2)1141-201902
    2024-07-30 16:35Educational Codeforces Round 168 (Rated for Div. 2)1599-431922
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)1721-401965
    2024-07-15 16:35Codeforces Round 958 (Div. 2)798-312005
    2024-06-30 17:35EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2)1012-152036
    2024-06-27 16:35Educational Codeforces Round 167 (Rated for Div. 2)250+832051
    2024-06-16 11:05Codeforces Round 953 (Div. 2)228+1761968